"Refraction of Light" Light Phenomenon PPT Courseware 6 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
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Authoritative PPT Summary
"Refraction of Light" Light Phenomenon PPT Courseware 6
learning target
1. Be able to describe the phenomenon of refraction of light
2. It can be said that light is refracted and the light path is reversible.
3. Be able to use the knowledge you have learned to explain refraction phenomena in life.
1. Refraction of light
1. Definition: When light is incident obliquely from one medium into another medium, the direction of propagation generally changes. This phenomenon is called refraction of light.
2. Incident angle and refraction angle
The angle between the incident ray and the normal is called the angle of incidence.
The angle between the refracted ray and the normal is called the refraction angle.
3. The law of refraction of light
① The refracted ray, incident ray and normal line are in the same plane;
② The refracted ray and the incident ray are separated on both sides of the normal line
③When light is incident from air into water or glass, the refraction angle is smaller than the incident angle.
④When light is incident obliquely from water or glass into the air, the refraction angle is greater than the incident angle.
⑤When light is emitted perpendicularly to the medium surface, the propagation direction does not change.
Class summary:
1. When light is incident obliquely from one medium into another medium, the direction of propagation generally changes. This phenomenon is called refraction of light.
2. The law of refraction of light
① The refracted ray, incident ray and normal line are in the same plane;
② The refracted ray and the incident ray are separated on both sides of the normal line
③When light is incident from air into water or glass, the refraction angle is smaller than the incident angle.
④When light is incident obliquely from water or glass into the air, the refraction angle is greater than the incident angle.
⑤When light is emitted perpendicularly to the medium surface, the propagation direction does not change.
3. In the phenomenon of refraction, the light path is reversible
1. When light slants from the air to the water surface, the refraction angle ______ the incident angle. When the light slants from the water into the air, the refraction angle ______ the incident angle.
2. When fishermen spear fish, they see a ______ image of the fish (fill in “virtual” or “real”). This is because light occurs ______ on the water surface.
3. Point out the optical knowledge contained in the following phenomena:
A. The "reflection" of the tree in the water______;
B. The water in the pool becomes shallower. C. The effect is immediate______;
D. The chopsticks inserted diagonally into the water bend upward ______.
4. Draw the refracted rays in each of the following diagrams:
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