Paraboloid focus demo instrument

Abstract

The invention discloses a paraboloid focus demo instrument which comprises an outer cover, a base, a bottom plate, a paraboloid block and a pinball, wherein the base is fixedly connected with the upper surface of the bottom plate; the paraboloid block is detachably arranged at the upper part of the base; a ball outlet is formed in the center of the paraboloid block; the outer cover covers outsidethe base and the paraboloid block; a paraboloid block replacing port for removing the paraboloid block in a horizontal side sliding manner is formed in a side wall of the outer cover; and a ball taking hole directly opposite to a through hole in the side wall of the base is further formed in the side wall of the outer cover. According to the paraboloid focus demo instrument, the pinball naturallyfalls from a pitching hole, falls down to a paraboloid along a trajectory parallel to the central axis of the paraboloid, and then moves obliquely upward through the rebound of the paraboloid until the pinball collides with a positioning block, and the situation that any light that is parallel to the central axis of a parabola passes through a focus of the paraboloid through the reflection of theparaboloid is simulated vividly and specifically.

Description

Technical field: [0001] The invention relates to the technical field of scientific and educational equipment, in particular to a parabolic focus demonstrator. Background technique: [0002] With the continuous improvement of people's living standards, the people's requirements for education are also constantly increasing. The unbalanced and insufficient development of education has brought about many problems, such as: lack of comprehensive quality training, lack of better education when teachers teach certain knowledge points, etc. Vivid teaching aids to help students understand memory and so on. [0003] A parabola refers to the orbit of a point in a plane that is equal in distance to a fixed point (focus) and a fixed line (directrix). The parabola is formed by rotating the parabola around its central axis. The parabola is widely used in car lights and flashlights. They are widely used in lighting fixtures and radars; their reflective surfaces or reflective surfaces are a...

AI Technical Summary

Problems solved by technology

[0004] When teaching knowledge about paraboloids, the teacher will use theoretical explanations or theoretical demonstrations to explain more abstractly that any light parallel to the central axis of the paraboloid will pass through the focus of the paraboloid when it is reflected by the paraboloid, but this cannot be intuitively presented to students or students. In front of other audiences, the audience can only memorize this theory by rote, and it is not easy to understand and remember it clearly. Even if they reluctantly accept this concept, they will still have doubts in their hearts

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