"Reflection of Light" Light Phenomenon PPT Courseware 14

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Beijing Normal University eighth grade physics volume one	pptx	6 MB

"Reflection of Light" Light Phenomenon PPT Courseware 14

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Upload Time: 2024-09-08

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Description

"Reflection of Light" Light Phenomenon PPT Courseware 14

1. Light source

Objects that can emit light are called light sources

practise

1. Which of the following objects is a light source ( )

A. Metal plate with smooth surface;

B. Working light bulb;

C. Unlit candle;

D. Mirror.

2. Light propagates along straight lines

Condition: Light propagates in a straight line in the same (uniform) medium.

3. Speed of light

speed of light in vacuum

V=3×108m/s

The speed of light propagating in air

V=3×108m/s

4. Light

Use a straight line with an arrow to describe the path and direction of light propagation

Reflection phenomenon of light:

When light is emitted from one medium to the interface of another medium, part of the light returns to the original medium, causing the propagation direction of the light to change. This phenomenon is called reflection of light.

law of reflection of light

⑴Reflected light and incident light are separated on both sides of the normal line

⑵The reflection angle is equal to the incident angle

⑶Reflected light, incident light, and normal are on the same plane

practise

1. Draw the incident ray based on the given reflected ray and indicate the incident angle.

6. Specular emission and diffuse reflection

Conclusion: Both specular reflection and diffuse reflection follow the law of light reflection.

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For more information about the "Light Phenomenon Reflection of Light" PPT courseware, please click on the "Light Phenomenon PPT Reflection of Light PPT" tab.

"Reflection of Light" PPT courseware download of light phenomena:

"Reflection of Light" PPT courseware download on light phenomena Part 1: Classification practice of knowledge points Knowledge point 1 Reflection phenomenon of light 1. As shown in Figure 4-2-1, we can see objects that do not emit light because the light from the object ______ enters our eyes. Knowledge points...

"Reflection of Light" PPT teaching courseware on light phenomena:

"Reflection of Light" PPT teaching courseware on light phenomena Part 1: Basic knowledge points Knowledge point 1 Reflection phenomenon of light 1. A setting sun spreads across the water, half river and half river red. It is a poem by Bai Juyi. The phenomenon described in the poem belongs to the phenomenon of reflection of light. 2.The following are relevant...

"Reflection of Light" PPT download of light phenomena:

"Reflection of Light" Light Phenomenon PPT Download Part One: New Knowledge Summary 1. Reflection of Light Reflection of light: When light encounters the surface of an object, it changes ________ and returns to the original substance. [Instruction]We can see objects that do not emit light because they are...

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Update Time: 2024-09-08

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"Reflection of Light" Light Phenomenon PPT Courseware 14