215 results about "Light reflectance" patented technology

The utility model is suitable for the technical field of solar cells, and provides a back contact solar cell, a photovoltaic assembly and a photovoltaic system, the back contact solar cell comprises a silicon substrate, the back surface of the silicon substrate is provided with a plurality of first doped regions and a plurality of second doped regions which are sequentially and alternately arranged along a first direction, the polarities of the first doped region and the second doped region are opposite, the adjacent first doped region and second doped region are electrically isolated through a groove, the groove comprises a side wall and a bottom surface, the side wall is provided with a plurality of first miniature pyramid structures, the bottom surface is provided with a plurality of second miniature pyramid structures, the first miniature pyramid structures correspond to a second direction, and the second direction corresponds to a third direction. The second micro pyramid structure corresponds to a third direction, and the third direction is perpendicular to the bottom face and intersects with the second direction. Through the arrangement, the light trapping effect between the first micro pyramid structure and the second micro pyramid structure is good, and the light reflectivity is reduced, so that the photoelectric conversion efficiency of the back contact solar cell is improved.

The invention relates to a bionic mist catching net material and a construction method and application thereof, and belongs to the field of air water collecting materials. The bionic mist catching net is a thermoplastic polymer fiber net, and radiation refrigeration particles are blended in fibers of the fiber net; and the part coated with the hydrophobic micro-nano coating and the part not coated with the hydrophobic micro-nano coating on the surface of the fiber net are alternately distributed. The radiation refrigeration particles are introduced into the bionic mist catching net material, and the hydrophobic coating is distributed on the surface of the bionic mist catching net material, so that the light reflectivity and the intermediate infrared emissivity are improved, and the radiation refrigeration efficiency is improved. Besides, the surface hydrophobic coating part forms a super-hydrophobic area, fog drops are promoted to be quickly coalesced into beads after collision, energy dissipation caused by spreading of a liquid film is reduced, the fiber substrate without the coating is kept hydrophilic, a heterogeneous wetting surface is formed, Laplace pressure difference is generated by surface energy difference at a hydrophilic-super-hydrophobic interface, and the super-hydrophobic surface is formed. The spontaneous migration of liquid drops from a super-hydrophobic region to a hydrophilic region is accelerated, and the water collection efficiency is remarkably improved.

The present application provides a kind of vehicle laminated glass and its application, which includes outer sheet glass, inner sheet glass and intermediate film, the outer sheet glass has the first surface towards outside and the second surface towards inside, the inner sheet glass has the third surface towards outside and the fourth surface towards inside, the intermediate film is bonded with the second surface and the third surface, infrared reflection film is provided between the outer sheet glass and the inner sheet glass, and low-emissivity film is provided on the fourth surface;The mirror factor α of the vehicle laminated glass is less than or equal to 15, and the mirror factor α is according to the formula α=RL / TL 2 RL is the visible light reflectance of the vehicle laminated glass measured from the inside, and TL is the visible light transmittance of the vehicle laminated glass. When the vehicle laminated glass is used as the sunroof glass of the vehicle roof, the use of sunshade curtain can be cancelled, the mirror reflection effect of the inside can be effectively improved, and the user experience and passenger privacy can be protected.

The utility model provides a glass assembly, a window assembly and a vehicle. The glass assembly includes: a glass body; the first functional layer is suitable for adjusting the visible light reflectivity and is arranged on one side of the glass body; and the second functional layer is suitable for adjusting haze and is arranged on one side of the first functional layer. According to the glass assembly, the first functional layer with the visible light reflectivity adjusting function and the second functional layer with the haze adjusting function are integrated, and the visible light reflectivity and / or the haze can be adjusted according to different application occasions and user requirements, so that the glass assembly has multiple functions, the user experience is improved, and the cost benefit requirement is met.

To provide a power generation module and a window in which a lead wire is inconspicuous when viewed from the indoor side.SOLUTION: A power generation module according to the present disclosure includes a first substrate having translucency, a transparent second substrate facing the first substrate, a first electrode layer provided on the first substrate, a semiconductor layer stacked on the first electrode layer, a second electrode layer stacked on the semiconductor layer, a lead wire provided on the first electrode layer, and a reflection suppression layer located between the lead wire and the second substrate so as to cover the lead wire in plan view. The optical reflectance of the reflection suppressing layer is lower than the optical reflectance of the lead wire. A window according to the present disclosure includes the power generation module and a fixture for fixing the power generation module to an installation object.SELECTED DRAWING: Figure 2

An organic light emitting display panel and an organic light emitting display device include an encapsulation layer positioned on a substrate where an organic light emitting element is disposed, a plurality of color filters positioned on the encapsulation layer, an overcoat layer in an opaque color, positioned on the plurality of color filters and including a plurality of colored particles, and an adhesive layer positioned on the overcoat layer and having reduced external light reflectance and power consumption by adjusting the thickness of the overcoat layer or the thickness of the color filter layer for each subpixel and allowing the overcoat layer to differ in color from the plurality of color filter layers.

The present invention relates to an optical lens comprising a substrate and a multi-layer antireflection coating provided on at least one of the main surfaces of the substrate and comprising a stack of at least one layer having a high refractive index and at least one layer having a low refractive index, a spectral reflectance curve of the multi-layer antireflection coating for an angle of incidence in the range of 0 DEG to 15 DEG has a reflection peak centered on a wavelength in the range of 435-450 nm and having a maximum reflectance of less than or equal to 30% and a full width at half maximum of less than or equal to 90 nm, and a local reflectance minimum in the range of 380-420 nm of less than or equal to 2% and a multi-layer antireflection coating for the at least one major surface, the multi-layer antireflection coating providing the at least one major surface with: for an angle of incidence in the range of 0 to 15 degrees, the present invention relates to a light-emitting device comprising a light-emitting element, a light-emitting element, an average light reflection factor Rv of 380 nm to 780 nm of less than or equal to 2.5%, an average blue light reflection factor RmB1 of greater than or equal to 15% in the wavelength range of 420 nm to 450 nm of greater than or equal to 15%, an average blue light reflection factor RmB3 of greater than or equal to 15% in the wavelength range of 440 nm to 460 nm of greater than or equal to 15%, and a ratio RmB1 / RmB3 of less than or equal to 1.

The invention discloses a semiconductor resistivity nondestructive testing method and system based on modulation light reflection, relates to the technical field of semiconductor resistivity detection, and aims to accurately measure a modulation component delta R / R of light reflectivity through a light reflection modulation signal so as to calculate the semiconductor resistivity and further realize quantitative measurement of the semiconductor resistivity. The sensor has ultrahigh sensitivity, can detect tiny carrier concentration change, and is very sensitive to electrical properties of surface and near-surface areas; meanwhile, the spatial resolution is high, and the micron-scale light spot at the sample is suitable for micro-area measurement; a complete optical method does not cause any damage to the sample; various types of samples can be measured; the measuring speed is fast, and the system can be easily integrated in a production line for real-time monitoring.

The application relates to the technical field of intelligent household appliances, and discloses a method for heat dissipation of an air conditioner, which comprises the following steps: determining whether freezing phenomenon exists at a drain outlet according to the change condition of the light reflectivity at the drain outlet; in the case that freezing phenomenon exists, starting a semiconductor heat dissipation fin and increasing the rotating speed of a circulating pump body; and in the case that freezing phenomenon does not exist, adjusting the rotating speed of the circulating pump body according to the temperature of an aluminum base plate. Heat is efficiently guided to the outdoor unit chassis through a heat conduction medium in a heat conduction pipeline to perform ice removal or defrosting, the clogging problem caused by the icing or frosting of the drain outlet is avoided, the utilization rate of energy is improved, the flow rate of the heat conduction medium in the heat conduction pipeline is adjusted based on the overall temperature of the heating component, the heat conduction efficiency of the heat conduction pipeline is matched with the overall temperature of the heating component, and the electric control box of the air conditioner can be timely heat dissipated. The application further discloses a device for heat dissipation of an air conditioner, an air conditioner and a storage medium.

A light scattering device is provided which is capable of suppressing heat generation in and around a light-exiting part and simultaneously limiting an irradiation area. A light scattering device 1 according to the present invention is provided with an optical fiber 10 comprising a core 10a positioned radially in the center and a sheath 10b positioned at the outer periphery of the core 10a, wherein the light scattering device 1 causes light entering from a proximal end of the optical fiber 10 to be emitted from a distal side T of the optical fiber 10.The optical fiber 10 is made of plastic and comprises: an optical transmission element 11 for transmitting the light entering from the proximal end to a distal end; and a light exit element 12, which allows the light transmitted by the light transmission element 11 to be emitted from an outer circumferential surface on the distal side T. The light exit element 12 is treated to suppress heat generation and comprises a reflective element 21 with a light reflectance of 80% or more in an area that does not form the light exit aperture 22 on the outer circumferential surface of the light exit element 12 and in a distal end surface TE. The reflective element 21 contains particles with light-reflecting properties, wherein the particles contain barium sulfate.

The embodiment of the invention relates to the technical field of vehicle cleaning, and discloses a vehicle surface bird droppings cleaning method and device, electronic equipment, a medium and a vehicle. According to the method, the light reflectivity of at least one wave band is collected as the background reference value, the second spectrum is determined based on the background reference value, the subsequent bird droppings detection efficiency can be effectively improved, the light absorptivity corresponding to the first preset wave band and the adjacent wave band is calculated on the basis, and the detection accuracy is improved. And when the light absorptivity of the first preset wave band is greater than the preset absorptivity and the light absorptivity of the adjacent wave band satisfies the preset condition, determining that uric acid exists, identifying the bird droppings in the to-be-detected area based on the light absorptivity, and performing secondary determination by using the bird droppings verification model, thereby further improving the accuracy of bird droppings detection. The problem that bird droppings attached to the vehicle body cannot be cleaned in time at least is solved, the vehicle body is guaranteed to be clean, and the vehicle body using experience of a user is improved.

This invention provides a liquid crystal light control element with which it is possible to achieve both an antiglare function and a heat generation suppression function. According to an embodiment, this liquid crystal light control element is characterized in that: the element includes a pair of transparent electrode substrates having a transparent electrode layer, and a light control layer disposed inside the transparent electrode substrates and containing liquid crystal molecules; the light control layer contains a dichroic dye; and the visible light transmittance of the transparent electrode substrates is 89% or less, and the visible light reflectance of the transparent electrode substrates is 6.5% or more.

The utility model discloses optical detection equipment, which comprises an air floating platform and a measuring case, the measuring case comprises a measuring case upper part and a measuring case lower part, the measuring case upper part is arranged above the air floating platform, the measuring case lower part is arranged below the air floating platform, and the measuring case upper part is arranged above the air floating platform. A first light emitting mechanism and an integrating sphere are arranged in the upper part of the measuring case, a second light emitting mechanism and a spectrograph are arranged in the lower part of the measuring case, light emitted by the first light emitting mechanism and the second light emitting mechanism enters the integrating sphere, and the integrating sphere is connected with the spectrograph through an optical fiber. The utility model provides optical detection equipment which can be used for quickly measuring optical properties such as reflection spectrum, transmission spectrum, visible light reflectivity, visible light transmittance, photovoltaic reflectivity, photovoltaic transmittance, color parameters, film thickness and the like of a sample. During measurement, the sample does not need to be overturned or moved, so that the detection efficiency of the sample is greatly improved.

A non-sintering technique is used to prepare a fluorescent thin film for laser lighting. This fluorescent film comprises a 0.5–2 mm thick aluminum substrate with a visible light reflectance greater than 95%, and a 100–500 μm thick emitting layer on the aluminum substrate. The emitting layer is obtained by mixing a fluorescent material and a fixative at 40–80 °C using a non-sintering technique. Under blue light excitation at 450 nm, the light emitted by the emitting layer mixes with unabsorbed blue light to produce white light with a color temperature range of 3000 K–4500 K and an Ra value of 90–98. The fluorescent thin film for laser lighting prepared by this invention has a simple overall structure and a convenient preparation process; the nitride red fluorescent material is not sintered, thus greatly preserving its luminescent properties; and the preparation process does not use water, which would decompose the nitride red fluorescent material; the fluorescent film is directly coupled to a highly thermally conductive aluminum plate, thereby enabling the fluorescent film to be used in laser lighting.

The application discloses an endoscope image electronic staining method, device, system and storage medium. The method extends an original wideband RGB image into a P-dimensional wideband image, and for each pixel point of a current frame: based on a current image block, a reference image block set is obtained by searching for reference image blocks in the current frame and K frames before and after the current frame; according to the similarity distance between each reference image block and the current image block, the image attenuation weight of each image block is determined, the image blocks are fused and weighted, and the RGB light reflectivity estimation data of the pixel point is obtained; based on the calibration matrix of the wideband image and the narrowband image, the narrowband light image signal data corresponding to the estimation data is obtained; based on the narrowband light image signal data of each pixel point, a narrowband image of the current frame is generated, and an electronic staining image is synthesized based on the narrowband image. The approximate imaging result of narrowband light illumination can be realized through software, so that better lesion observation effect is obtained at low cost.

The invention provides a steel surface phase-change intelligent temperature-adjusting water-based anti-corrosion and anti-rust paint as well as a preparation method, application and a construction method thereof, and belongs to the field of building materials. Reflection and radiation materials and phase-change materials such as nanometer aluminum oxide, nanometer silicon-based oxide, nanometer yttrium oxide, glass microspheres and nanometer vanadium dioxide are added into the steel surface phase-change intelligent temperature-adjusting water-based anti-corrosion and anti-rust paint disclosed by the invention; the hemispherical emissivity, the medium-brightness sunlight reflectance, the near-infrared light reflectance and the phase-change intelligent temperature-adjusting function of the phase-change intelligent temperature-adjusting water-based anti-corrosion and anti-rust paint on the steel surface are synergistically enhanced; by adding the derusting agent, the anti-flash-rust agent, the multifunctional anti-rust powder, the zinc phosphate, the aluminum triphosphate and the mica powder, the anti-corrosion and anti-rust effects of the steel surface phase-change intelligent temperature-adjusting water-based anti-corrosion and anti-rust paint are improved. Results of the embodiment show that the steel surface phase-change intelligent temperature-adjusting water-based anti-corrosion and anti-rust paint is excellent in anti-corrosion and anti-rust effects.

This technology provides a way to easily perform decorative coloring on a substrate. [Solution] The decorative film deposition apparatus comprises a chamber, a titanium particle emission unit including a titanium target disposed in the chamber and which imparts energy to the titanium target to release titanium particles, a gas supply unit connected to the chamber and which supplies a reactive gas, and a control unit which controls the gas supply unit. The gas supply unit has a carbon-containing gas supply unit which supplies a carbon-containing gas containing carbon atoms into the chamber, a nitrogen-containing gas supply unit which supplies a nitrogen-containing gas containing nitrogen atoms into the chamber, and a flow rate adjustment unit which can adjust the flow rate of the carbon-containing gas with respect to the flow rate of the nitrogen-containing gas, and the control unit adjusts the flow rate of the carbon-containing gas with respect to the flow rate adjustment unit to adjust the visible light reflectance of the film formed on the object to be deposited.

The application relates to the technical field of silicone coating preparation, and discloses a preparation method and application of white fluorine-free photovoltaic coating. 1 )4, R 2 Si(OR 3 )3, R 4 2Si(OR 5 )2, R 6 Si(OR 3 )3 and R 4 Si(OR 5 )3 are hydrolyzed and polycondensated in mixed acid solution to obtain a silicone resin; 100 parts of the silicone resin is mixed with 20-100 parts of an organic silicon modified hydroxyl acrylic resin coating prepared according to a specific ratio and 50-200 parts of titanium white paste prepared according to a specific ratio, and the white fluorine-free photovoltaic coating is obtained. The white fluorine-free photovoltaic coating has good adhesion and adhesion force to a photovoltaic substrate, high hardness, good scratch resistance and aging resistance, and high light reflectivity.

To evaluate the functionality of closed conduit drainage water in a farm field using a simplified configuration.SOLUTION: An information processing device (1) comprises an acquisition unit (111) that acquires the red reflectance and near-infrared reflectance of a farm field, a first calculation unit (112) that calculates a value of a dryness index indicating the degree of dryness of the farm field by referring to the red reflectance and near-infrared reflectance, and a second calculation unit (113) that calculates a value of an index indicating the drainage function of the closed conduit by referring to the value of the dryness index calculated by the first calculation unit, the value of the dryness index when the farm field is in a wet state, and the value of the dryness index when the farm field is in a dry state.SELECTED DRAWING: Figure 1

The invention provides a glass polarized light reflectivity spectrum detection method and device. The method comprises the following steps: moving a glass sample to a position below a reflectivity test module on a manipulator; determining the vertical distance between the detection end face and the glass sample according to displacement data of the Z-axis displacement meter; determining the parallelism of the detection end face and the glass sample according to the attitude data of the attitude sensor; when the vertical distance and the parallelism meet a preset data range, carrying out a reflectivity test on the glass sample through a reflectivity test module to obtain the reflectivity of the glass sample; through the feedback and regulation of the vertical distance and parallelism between the detection end face and the glass sample, the emergent light spot can be accurately aligned with the target point position of the glass sample, and the precision of glass polarized light reflectance spectrum detection is improved.

The present invention provides a layered body with which it is possible to improve drawing speed.　The layered body comprises: at least three recording layers each capable of changing the color state thereof to a different color under near infrared laser light; and a diffuse reflection layer (21) disposed below the at least three recording layers. The total light reflectivity of near infrared light having a wavelength of 1080 nm that arrives at the diffuse reflection layer (21) from the at least three recording layers side is at least 93.0%.

A display device includes a first color filter, a second color filter, a first pixel electrode, a second pixel electrode, a common electrode, an insulating film, and a light blocking part that is disposed at a boundary between the first color filter and the second color filter. The light blocking part includes a light blocking film, a first transmission film disposed on the upper layer side of the light blocking film, and a reflection / transmission film disposed on the upper layer side of the first transmission film, the light blocking film has a light transmittance lower than light transmittances of the first transmission film and the reflection / transmission film, the first transmission film has the light transmittance higher than that of the reflection / transmission film, and the reflection / transmission film has a light reflectance higher than that of the first transmission film and lower than that of the light blocking film.

The present invention provides a technology with which it is possible to easily perform decoration for causing a base material to develop a color. This decorative film formation device comprises: a chamber; a titanium particle discharge unit which includes a titanium target disposed in the chamber and applies energy to the titanium target so as to discharge titanium particles; a gas supply unit which is connected to the chamber and supplies a reactive gas; and a control unit which controls the gas supply unit. The gas supply unit has: a carbon-containing gas supply unit for supplying a carbon-containing gas that contains carbon atoms into the chamber; a nitrogen-containing gas supply unit for supplying a nitrogen-containing gas that contains nitrogen atoms into the chamber; and a flow rate adjustment unit which is capable of adjusting the flow rate of the carbon-containing gas with respect to the flow rate of the nitrogen-containing gas. The control unit adjusts the visible light reflectance of a film that is formed on a film formation object by adjusting the flow rate of the carbon-containing gas using the flow rate adjustment unit.

A method of manufacturing a lens includes: injecting a thermosetting first resin in a first mold, and curing the thermosetting first resin, to form a cover blank having cover parts; removing a part or all parts of the first mold; arranging the cover blank in a second mold; injecting a thermosetting second resin having a greater light absorptance or a greater light reflectance than the thermosetting first resin into the second mold and curing the thermosetting second resin, to form a lens blank having a light-shielding part between adjacent ones of the cover parts; taking out the lens blank from the second mold; cutting the lens blank at the light-shielding part located between the adjacent ones of the cover parts to obtain individual lenses having lateral side walls and flange parts extending outward from lower-end portions of the lateral side walls, which are both covered by the light-shielding part.

The invention discloses a photovoltaic panel cleaning device, a cleaning method and a photovoltaic system, dust on the surface of a photovoltaic panel can be removed, and the power generation efficiency of the photovoltaic panel is improved. The photovoltaic panel cleaning device comprises a reflectivity sensor used for being arranged on the light incident side of a photovoltaic panel, and the reflectivity sensor is used for monitoring the light reflectivity of the plate face of the light incident side of the photovoltaic panel to obtain light reflectivity data; the temperature sensor is used for being arranged on the back side of the photovoltaic panel, and the temperature sensor is used for monitoring the temperature of the photovoltaic panel to obtain temperature data; the water spraying assembly is arranged on the peripheral side of the photovoltaic panel, and the water spraying assembly communicates with the water purifying assembly through a pressure pump; and the controller is connected with the reflectivity sensor, the temperature sensor, the water spraying assembly and the pressure pump, and the controller is used for generating a cleaning instruction according to the light reflectivity data and / or the temperature data.

The invention discloses a semiconductor structure for wafer bonding and a method for improving wafer bonding alignment. The bonding mark of the semiconductor structure comprises a contrast enhancement layer and a first dielectric layer which are stacked in sequence, and the light reflectivity of the contrast enhancement layer is higher than that of the first dielectric layer. According to the method, accurate alignment and bonding of the wafer are realized by using the high-contrast bonding mark structure. By introducing the contrast enhancement layer with high reflectivity, such as a silicon nitride layer, into the bonding mark, the optical contrast of the mark is remarkably improved, so that the recognition precision of bonding equipment is improved, the alignment error is reduced, the subsequent process risk is reduced, and the product yield is effectively improved.

The invention discloses a control system of photoelectric equipment, and relates to the technical field of control of the photoelectric equipment, and the control system comprises a sensing module which is used for collecting a welding seam image, a temperature field, a vibration quantity and a light reflectivity of a welding area in real time; the intelligent decision module dynamically optimizes welding parameters based on the real-time data of the sensing module; the execution control module is used for controlling the laser generator, the robot or the linear module and the gas valve according to the welding parameters output by the intelligent decision module; the man-machine interaction module is used for information interaction between an operator and the system; the data storage and analysis module is used for storing all data in the welding amount process; according to the control system of the optoelectronic equipment, multi-dimensional and high-precision sensing of the welding state is achieved through multi-source sensor fusion and standardized sensing steps in combination with improved YOLOv8, Kalman-particle filtering and other algorithms, and a reliable data basis is provided for decision making.

This invention discloses a photovoltaic module manufacturing method and a photovoltaic module, comprising the following steps: Step 1, preparing multiple back-contact photovoltaic cells; Step 2, connecting adjacent back-contact photovoltaic cells using metal connecting strips, the metal connecting strips having a width of 2 mm to 8 mm and a thickness of 0.01 mm to 0.1 mm; Step 3, forming a reliable connection between the metal connecting strips and the back electrodes of the back-contact photovoltaic cells using a welding process; Step 4, using the metal connecting strips as a light-reflecting layer to increase the reflectivity of the back side of the back-contact photovoltaic cells to long-wavelength spectra, and the surface of the metal connecting strips being polished or coated with a reflective enhancement layer. This application utilizes a photovoltaic module manufacturing method that uses wide metal strip connections to increase back-side light reflectivity, thereby improving module power. The aim is to improve the back-side reflectivity to long-wavelength spectra by optimizing the cell connection structure, achieving light energy recovery and utilization, and thus improving module conversion efficiency.

The present application relates to the technical field of floor tile polishing, and specifically discloses a polishing control method, device, equipment and medium for a floor tile polishing robot, wherein the method comprises the following steps: in the process of polishing based on the movement of the polishing path of the floor tile polishing robot, obtaining the first light reflectivity information of the floor tile surface on the tail side of the floor tile polishing robot based on the reflectivity sensor; generating a light reflectivity curve according to the first light reflectivity information; analyzing the to-be-repaired polishing path segment and generating corresponding polishing repair parameters according to the change of the light reflectivity curve and the polishing path; and controlling the floor tile polishing robot to perform repair polishing on the to-be-repaired polishing path segment according to the polishing repair parameters. The method can determine the to-be-repaired polishing path segment and the polishing repair parameters to control the floor tile polishing robot to perform automatic repair polishing, thereby ensuring high consistency of the floor tile polishing process, eliminating the manual inspection and repair process, and greatly reducing the labor cost.

The invention relates to a mini-LED light panel used as a display and filled with reflective colloid to increase brightness, and to its mini-LED display. The light panel comprises a substrate, LED units, a first reflective colloid, and a second reflective colloid. The display comprises an assembled display panel and a frame. The LED units are arranged on the substrate and each contains a first and second LED or a first to third LED. The light emission angle of the LEDs is greater than or equal to 90 degrees. The extension lengths of the first to third LEDs in the X and Y axes are 25–500 µm. The extension length in the Y-axis is greater than or equal to the extension length in the X-axis. The first light compensation segment is formed between the LEDs of the LED unit.The second and third light compensation segments are formed between adjacent LED units in the X and Y axes. The second light compensation segment is larger than the first light compensation segment. The third light compensation segment is also larger than the second light compensation segment. The reflectivity of the first and second reflecting colloids relative to light wavelengths from 420 nm to 700 nm is greater than 50%, and the reflectivity of the first reflecting colloid is greater than that of the second reflecting colloid.