"Plane Mirror Imaging" PPT teaching courseware on light phenomena

"Plane Mirror Imaging" PPT teaching courseware on light phenomena

Part One Content: Basic Knowledge Key Points

Knowledge point 1: Characteristics of plane mirror imaging

1. A student with a height of 1.6 m stands 1 m in front of a plane mirror. The distance between the image in the mirror and the mirror surface is 1 m. The height of the image in the mirror is 1.6 m. When the person approaches the plane mirror, the size of his image in the mirror is Will remain unchanged (optional "get bigger", "get smaller" or "unchange").

2. In the experiment of "Exploring the Imaging Characteristics of Plane Mirrors", the experimental device is as shown in the figure.

(1) Lay the paper flat on a horizontal table, place the glass plate vertically on the paper, place a lit candle on one side of the glass plate, and observe the image of the candle on the other side through the glass plate;

(2) Place the light screen at the image position, and observe whether there is an image on the light screen without passing through the glass plate;

(3) Place another identical unlit candle on the glass plate and adjust its position so that it coincides with the image, indicating that the size of the image and the object are equal;

(4) Move the candle a certain distance away from the glass plate, and the image of the candle will move the same (optional "same" or "different") distance away from the glass plate (optional "far away" or "closer").

Knowledge point 2: Plane mirror forms virtual image

3. As shown in the figure, the light entering the human eye is caused by (C)

A. Emitted by plane mirror B. Emitted by image S'

C. Reflected by plane mirror D. Emitted by human eyes

4. It is recorded in "Zi Zhi Tong Jian" that "people use copper as a mirror to straighten their clothes; use ancient times as a mirror to see the rise and fall." Our ancestors have long used polished copper surfaces as mirrors to observe own image. Then the image of a person in the bronze mirror (D)

A. Inverted, reduced real image B. Upright, equal-sized real image

C. Upright, enlarged virtual image D. Upright, equal-sized virtual image

Knowledge point 3 Application of plane mirror

5. Cars have gradually entered the lives of ordinary people. Xiao Ming has conducted various researches: There are many places on the car where light reflection is used, as shown in Figure A and B. A is the rearview mirror and B is the interior of the headlight. of reflectors. A should be a convex mirror (optional "plane mirror", "concave mirror" or "convex mirror"). Xiao Ming observed carefully and found that the windshield in front of the car was not installed vertically. From an optical perspective, the main reason was to prevent the image formed on the windshield from interfering with the driver's driving.

6. Among the following examples, the one that is not an application of plane mirror imaging is (C)

A. Dancers use mirrors to correct their posture

B. The dentist uses a mouth mirror to see the back of the teeth clearly

C. When driving at night, the lights in the car must be turned off

D. Plane mirrors are often used in interior decoration to expand the visual space.

Plane mirror imaging PPT, part 2: improvement of comprehensive capabilities

7. Xiaogang stands still in front of a plane mirror. If the mirror is raised vertically by 20 cm, the image in the mirror will not move (optional "move upwards", "move downwards" or "move not moving").

8. When checking eyesight, place the eye chart above and behind the subject's head, and the subject identifies the image in the mirror on the opposite wall. As shown in the figure, the image of the eye chart in the mirror is 5 meters away from the subject. , if the total length of the eye chart is 0.8 m, then the length of the image of the eye chart in the mirror is 0.8 m.

9. Xiao Ming saw from the plane mirror the images formed by the quartz wall clock and the electronic clock opposite the mirror, as shown in the picture. The corresponding moments at this time are (C)

A.02:35 and 20:01 B.09:25 and 10:21

C.09:25 and 10:05 D.02:35 and 10:05

10. As shown in the picture is an inclined plane mirror. When you walk towards the plane mirror, which of the following descriptions is true (B)

A. The image in the mirror becomes larger

B. The image in the mirror is a virtual image

C. The line connecting the image to you is not perpendicular to the mirror surface

D.The image in the mirror will be far away from you

11. A person stands in front of a plane mirror placed on a trolley. When the trolley moves to the right at a constant speed of 0.5 m/s, the image of the person will be (C)

A. Move away from people at a speed of 0.5 m/s

B. Approach the person at a speed of 0.5 m/s

C. Move away from people at a speed of 1 m/s

D. Approach the person at a speed of 1 m/s

Plane mirror imaging PPT, the third part: Expanding exploration and breakthroughs

14. (Yueyang High School Entrance Examination) During the "Enter Tibet" activity, Xiao Ming was curious about the solar stoves made of large concave mirrors used by Tibetans to boil water (as shown in Figure A). So he used the inner surface of a stainless steel spoon as a concave mirror and illuminated the parallel light directly on the "concave mirror". The light path is as shown in Figure B.

(1) When using a solar cooker to boil water, the kettle should be placed at point b (optional "a", "b" or "c") in Figure B;

(2) Xiao Ming also observed that the "satellite pot" (as shown in Figure C) that collects weak TV signals has a similar structure. Do you think the concave pot surface of the "satellite pot" should be made of materials that have strong reflective (optional "reflective" or "absorbent") properties for TV signals.

Keywords: Free download of PPT courseware for eighth-grade physics volume 1 of the People's Education Press, PPT download of plane mirror imaging, PPT download of light phenomena, .PPT format;

For more information about the "Light Phenomena Plane Mirror Imaging" PPT courseware, please click the "Light Phenomena Plane Mirror Imaging ppt" tab.

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