"Plane Mirror Imaging" Light Phenomenon PPT Courseware 2

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"Plane Mirror Imaging" Light Phenomenon PPT Courseware 2

1. Plane mirror

Plane mirror - a mirror whose reflecting surface is smooth and flat.

What is the relationship between the image formed by a plane mirror and the object?

2. Characteristics of plane mirror imaging

1.Ask a question

What are the characteristics of plane mirror imaging?

2. Conjectures and Assumptions

Conjecture 1: The size of the image may be ______ with the size of the object?

Conjecture 2: The distance from the image to the mirror and the distance from the object to the mirror may be ______?

Conjecture 3: The connection between the image and the object may be ______ with the mirror?

Conjecture 4: The image formed by a plane mirror may be a ______ image?

Conjecture 5: As the distance from the object to the mirror increases, the size of the image...

Guess 6: What is the left-right relationship between images and objects______?

Experimental plan design:

(1) First place the glass plate vertically on the wooden frame.

(2) Place candle A in front of the glass plate. When viewed from the front of the glass, there is an image of candle A behind the glass plate.

(3) Place candle B where the image of candle A completely overlaps for comparison.

(4) When measuring the image distance and object distance, mark the positions of the plane mirror, image and object, and use a scale to measure the distance.

Characteristics of plane mirror imaging

1. The size of the image imaged by the plane mirror is equal to the size of the object.

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

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

4. The image formed by the plane mirror is a virtual image

5. The left and right sides of images and objects are opposite

Imaging properties of plane mirrors: upright, equally large, equidistant, left and right opposite virtual images

The image and object are symmetrical to the mirror surface.

What you learned in this lesson:

1. Characteristics (rules) of plane mirror imaging

1) Create an upright, equidistant virtual image of equal size.

2) The line connecting the image point and object point is perpendicular to the mirror surface.

3) The image is opposite to the left and right of the object.

2. Virtual image: an image formed by the convergence of reverse extension lines of reflected light

3. Application of plane mirror: imaging, changing light path

4. Convex mirror: diffuse the light

Concave mirror: Concentrates light

practise:

1. A person walks towards a vertically hung plane mirror from a distance. His image in the mirror will......[ ]

A. Gradually becomes larger and closer to the mirror.

B. Gradually become smaller and gradually move away from the mirror.

C. First get bigger and then get smaller, first get closer to the mirror and then move away from the mirror.

D． The size remains unchanged, but gradually moves closer to the mirror.

2. A 1.7 m person stands 2 m in front of a full-length mirror. The distance from his image in the mirror to the mirror surface is ___m. When he advances 0.5m toward the mirror, the distance between the person and the image is ____m. The height of the image is ______.

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Update Time: 2024-10-11

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

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