"Integration of this Chapter" Light Phenomenon PPT

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"Integration of this Chapter" Light Phenomenon PPT

High School Entrance Examination Focus Experience

1. (2018 Chifeng High School Entrance Examination in Inner Mongolia) Regarding the phenomenon of light, which of the following statements is correct ()

A. Light propagates along straight lines in the same medium

B. The optical path is irreversible in the phenomenon of diffuse reflection

C. The farther the same person is from the plane mirror, the smaller the image will be

D. In the phenomenon of refraction, when the angle of incidence increases, the angle of refraction also increases.

2. (2018·Inner Mongolia Hohhot High School Entrance Examination) Among the four phenomena shown in the figure, the one that belongs to the reflection phenomenon of light is ()

The reflection of a mountain in the water is a plane mirror image, which is formed by the reflection of light, so A is correct; the shadow is formed by the propagation of light in a straight line, so B is wrong; when the rain passes and the sky clears, a rainbow often appears in the sky. This is Sunlight is refracted by tiny water droplets suspended in the air. After white light is refracted by water droplets, it is divided into various colored lights. This phenomenon is called dispersion of light, so C is wrong; light reflected from a steel spoon in the water When water enters the air obliquely, refraction occurs, and the refracted light rays move away from the normal. When people look against the direction of the refracted light rays, they see a virtual image of the ladle, which is higher than the actual position, so it feels like the ladle has been broken. , so D is wrong.

3. (2018·Hubei Huangshi High School Entrance Examination) As shown in the figure, a light ray emitted by the light source O in the water shoots towards the water surface, and is reflected and refracted at the water surface. The reflected light passes through point P, and the refracted light passes through point A. Please first find the reflection point on the water surface by drawing the dotted line in the picture, and then draw the incident ray, reflected ray and refracted ray.

4. (2018·Chifeng High School Entrance Examination in Inner Mongolia) As shown in the figure, draw the light path diagram of the light emitted from the vertex S of the clown hat after being reflected by the plane mirror and entering the clown's eyes (just draw the light entering one of the eyes and keep the drawing trace).

5. (2018·Bayannur High School Entrance Examination, Inner Mongolia) The picture on the right is a picture of the experimental device to explore the imaging characteristics of plane mirrors. A person stands in front of a vertical glass plate and lights candle A, and takes unlit candle B and moves it vertically behind the glass plate until The images of candle B and candle A are exactly the same.

(1) The image of the candle flame seen by a person on the same side of candle A is caused by the ______ (optional "reflection" or "refraction") phenomenon of light.

(2) Remove candle B and place a light screen in its original position. The image of candle A cannot appear on the light screen, indicating ____________________.

(3) During the experiment, move candle A gradually away from the glass plate, its image will ______ (optional "far away" or "closer") to the glass plate, and the size of the image will ______ (optional "get bigger" or "smaller") ” or “unchanged”).

6. (2018·Jiangsu Zhenjiang High School Entrance Examination) As shown in Figure A, a transparent thin-walled (thickness is negligible) square sink is placed horizontally. The laser pointer fixed at the bottom of the sink emits a thin beam in the direction shown in the picture. Xiaobin passes Slowly change the amount of water in the tank to explore how light travels.

(1) When the water tank in Figure A is not filled with water, a light spot can be obtained at A on the side wall. After a certain amount of water is injected, the light spot moves to B. This is due to the ____________ of light occurring at the water surface. Phenomenon, at this time the incident angle ______ (optional "greater than", "equal to" or "less than") angle θ.

(2) In order to move the light point at B to C, the amount of water in the water tank should be ______. If the distance between BC is 2 cm, then the change in water surface height Δh______ (optional ">", "=" or "<") is 2 cm.

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Update Time: 2024-09-07

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 1 industry PPT template

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