Science popularization teaching device for demonstrating generation of colored shadows

Abstract

The invention relates to the field of a science popularization device, in particular to a science popularization teaching device for demonstrating the generation of colored shadows. The science popularization teaching device comprises a display table, a lamp frame and a display plate, wherein the lamp frame is fixed on the display table; the display plate is vertically arranged on the display table and is arranged in a way of forming an interval from the lamp frame; the space between the lamp frame and the display plate is adjustable; three rotating lamp supporters distributed in an equilateral triangle shape are arranged on the lamp frame; a red spot lamp capable of emitting red light rays, a green spot lamp capable of emitting green light rays and a blue spot lamp capable of emitting blue light rays are fixed on the three rotating lamp supporters; and the optical axis of each of the red spot lamp, the green spot lamp and the blue spot lamp is parallel to the horizontal plane. Compared with the prior art, the science popularization teaching device for demonstrating the generation of colored shadows has the advantages that the gradual change effect can be achieved; and the optical phenomenon of the colored shadows can be better shown.

Description

technical field [0001] The invention relates to the field of popular science devices, in particular to a popular science teaching device for demonstrating the generation of colored shadows. Background technique [0002] All colors in nature are a mixture of three basic colors. The three primary colors are independent of each other, and any one of them cannot be produced by mixing other two colors, but they are complete, that is, all other colors can be obtained by combining the three primary colors in different proportions. When different proportions of the three primary color lights are added together, the color is additive mixed color, the rule is: red+green=yellow, red+blue=purple, blue+green=cyan, red+blue+green=white, when different proportions When the pigments are mixed together, the composition of their absorption spectrum will also change accordingly, so as to obtain different colors. The rules are: yellow=white-blue, purple=white-green, blue=white-red, yellow+purp...

AI Technical Summary

Problems solved by technology

[0003] Existing shadow popularization devices used to demonstrate color generally use fixed three-primary-color projection lamps. The three-primary-color projection lamps are distributed in an equilateral triangle. There is a common intersection area to form white light and shadow, and the three kinds of light intersect in pairs to form three kinds of light and shadow, yellow, purple, and blue, and the three kinds of light have a non-intersecting area, forming the original three colors of red, blue, and green The light and shadow; and because the distance between the usual panel and the spotlight is not adjustable, if you do not choose a spotlight with a certain brightness, the color shadow will not be obvious, and the three spotlights will directly intersect after they are turned on , it does not have a gradient effect, and for young children, the effect of science popularization is not very good

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