"Reflection of Light" PPT courseware on light phenomena

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"Reflection of Light" PPT courseware on light phenomena

1. Understand "one point, one side, two corners and three lines"

Normal: a straight line that passes through the incident point and is perpendicular to the mirror (ON) - dotted line

Angle of incidence: the angle between the incident ray and the normal (i)

Reflection angle: the angle between the reflected light and the normal (r)

Exploration 1: What is the relationship between the positions of reflected light and incident light?

Conclusion 1: The reflected ray, incident ray and normal line are in __________,

Reflected rays and incident rays are separated on the normal line _______.

Exploration 2: What is the relationship between the reflection angle and the incident angle?

2. The law of reflection of light

in the phenomenon of light reflection

(1) Reflected light, incident light, and normal are in the same plane

(2) Reflected light and incident light are separated on both sides of the normal line

(3) The reflection angle is equal to the incident angle

test you

1. As shown in the picture, please tell me

__________ is the angle of incidence;

__________ is the reflection angle.

2. Try to create the reflected light in the picture on the right, and mark the reflection angle.

What happens if the light is incident vertically?

3. The optical path is reversible in the reflection phenomenon

In the phenomenon of reflection, the light path is ________.

Student A can see classmate B’s eyes through the plane mirror, then classmate B ____ can see classmate A’s eyes. ("can" or "can't")

4. Both specular reflection and diffuse reflection follow the law of light reflection.

When parallel light is incident on a smooth surface, the reflected light will ______. This reflection is called specular reflection.

When parallel light is incident on a rough surface, the reflected light will ______. This reflection is called diffuse reflection.

5. The significance of reflection phenomena in production and life

When light hits the taillight from any angle, it can "reflect" the light back. Can you draw its light path?

Using laser beams and corner reflectors, the distance between the Moon and the Earth is measured to be approximately 384,000 kilometers.

Operation:

1. After class, what are the other applications of the knowledge learned in this section?

2. Use hands and brain to learn physics T1, 3, 4

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

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Update Time: 2024-08-13

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

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