"Plane Mirror Imaging" Colorful Light PPT Courseware

Description

"Plane Mirror Imaging" Colorful Light PPT Courseware

Activity:

Observe the image in a plane mirror:

Ask students to observe their faces with a plane mirror and think about the following questions:

(1) Are the face and face image the same size?

The size of the face and the image of the face are equal

(2) When you blink your right eye, does the image in the plane mirror also blink your right eye?

The image in the plane mirror is blinking the left eye

1. Characteristics of plane mirror imaging:

Ask the question: What are the characteristics of plane mirror imaging?

Conjectures and assumptions: The size of the image and the object may be equal, and the distances from the image and the object to the plane mirror may be equal.

design experiment

1. Experimental equipment:

Two identical candles, a light bench, a glass plate, a light screen, matches, and a scale.

2. Experimental steps:

1. Place the glass plate vertically in the center of the light bench, stand 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 directly observe whether there is an image on the light screen without passing through the glass plate.

3. Place the same unlit candle in the position of the image and observe the size relationship between the image and the candle.

4. Move to the position of the candle and observe whether the size of its image changes.

5. Measure the distance from the candle and image to the glass plate.

Characteristics of plane mirror imaging

1. The distance between the image and the object to the mirror is equal

2. The size of the image is equal to that of the object

3. The line connecting the image and the object is perpendicular to the mirror surface

4. The upright virtual image formed by a plane mirror

2. Virtual image

The image formed by the convergence of reverse extension lines of light is called a virtual image.

The virtual image can be observed with the eyes, but cannot be received by the light screen. The virtual image is represented by a dotted line when drawing.

Plane mirror imaging

As shown in the figure, MN represents a plane mirror, AB represents the object in front of the mirror, and the diagram is drawn according to the imaging characteristics of the plane mirror.

1. Make a vertical line

2. Take equal distances

3. Draw a virtual image

3. The function of plane mirror:

1. Change the propagation direction of light

2. Imaging

Full-length mirror, make-up mirror, mirror behind display counter

Class exercises:

1. "Guilin's landscape is the best in the world". The beautiful peaks on both sides of the Li River clearly reflect "reflections" on the calm water. It is: ( )

A. mountain shadow

B． real image of mountain

C. virtual image of mountain standing upside down

D． virtual image of mountain standing upright

2. The image of the clown in a plane mirror, the correct one in the picture is ( )

3. The pointer position on a clock face is seen from a plane mirror as shown in the figure. At this time, the time is ( ).

A. 7:25 B. 6:35

C、5:25 D、4:35

4. When a person approaches a plane mirror, his image in the mirror will be: ( )

A. Get bigger

B. become smaller

C. unchanged

Classwork:

1. The characteristics of plane mirror imaging are: the image of an object in a plane mirror is ______, the size of the image and the object is ______, their connection to the mirror surface is ______, and their distance to the mirror surface is ______.

2. A person stands 3 meters in front of a vertical plane mirror. His image in the mirror is ______ meters away from him. If he moves closer to the plane mirror, his image in the plane mirror will be ______.

3. Place a plane mirror vertically on the wall. When you approach perpendicular to the plane mirror at a speed of 2m/s, your image in the mirror will be ()

A. Move away from the plane mirror at a speed of 4m/s

B． Approach the plane mirror at a speed of 4m/s

C. Move away from the plane mirror at a speed of 2m/s

D． Approach the plane mirror at a speed of 2m/s

4. We see "reflections" and immediate "shadows" of trees and buildings by the river. The former is caused by ______, and the latter is caused by ______.

5. Create a virtual image of an object in a plane mirror.

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

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Update Time: 2024-07-01

This template belongs to Physics courseware Shanghai Science Edition 8th Grade Physics industry PPT template

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