| Category | Format | Size |
|---|---|---|
| People's Education Edition Physics for Grade 8, Volume 1 | pptx | 6 MB |
"Refraction of Light" Light Phenomenon PPT Courseware 2
Description
"Refraction of Light" Light Phenomenon PPT Courseware 2
Review the past and learn the new
1. The reflection in the water is the ______ image formed by the Tower Bridge. It is formed from ______.
2. What is the reflection of light?
The phenomenon that light incident on the interface of two media changes direction and then returns to the original medium.
Reflection of light is the phenomenon of light propagating in the same medium.
What is the refraction of light?
experiment
(1) When light is incident from air into water, how does light propagate in the air? How does it spread in water?
Propagate in a straight line
(3) What happens at the interface where light enters water from air?
Change in the direction of light propagation (refraction phenomenon)
refraction of light
The phenomenon of light incident from air into another medium or from one medium into air is called refraction of light
think about it
What is the law of reflection?
Are the laws of refraction and reflection the same?
Refraction The reflected ray, incident ray and normal are in the same plane;
Refraction The reflected ray and incident ray are located on both sides of the normal;
Refraction The angle of reflection is equal to the angle of incidence.
Laws of refraction
Refracted rays, incident rays, and normals are in the same plane;
The refracted ray and the incident ray are located on both sides of the normal
When light is incident obliquely from air into another medium, the angle of refraction is less than the angle of incidence
When light enters air obliquely from another medium, the angle of refraction is greater than the angle of incidence
When light is incident vertically, the direction of propagation is ________, and the angle of refraction is equal to the angle of incidence.
Class exercises
1. The water in the pool looks _________ than it actually is. This is caused by the ________ that occurs when light enters _________ from _________. What you see is a _________ image of the actual bottom of the pool.
2. As shown in the figure, OB is the reflected ray of light from the air to the water surface. Draw the incident ray in the figure, mark the degree of the incident angle, and draw the general direction of the refracted ray.
3． Watching "fish swimming in the clouds" in the calm water by the lake, then ( )
A. "Fish" is a virtual image formed by the reflection of light, and "cloud" is a virtual image formed by the refraction of light.
B. "Fish" is a virtual image formed by the refraction of light, and "cloud" is a virtual image formed by the reflection of light.
C. “Fish” and “clouds” are both virtual images formed by the reflection of light
D． “Fish” and “clouds” are both virtual images formed by the refraction of light.
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For more information about the "Light Phenomenon Refraction of Light" PPT courseware, please click the "Light Phenomenon ppt Refraction of Light ppt" tag.
"Exploring the Law of Refraction of Light" Light and Eyes PPT Courseware 2:
"Exploring the Laws of Refraction of Light" Light and Eyes PPT Courseware 2 Learning Objectives 1. Know what the refraction phenomenon of light is 2. Know the laws of refraction of light 3. Know that when light is refracted, the light path is also reversible 4. Through observation and experience There is an illusion caused by refraction, a preliminary understanding...
"Exploring the Law of Refraction of Light" PPT courseware on light and eyes:
"Exploring the Laws of Refraction of Light" Light and Eyes PPT Courseware Teaching Objectives 1. Understand the phenomenon of refraction of light. 2. Understand the laws of refraction of light and be able to use the laws to analyze and explain common refraction phenomena in life. 3. Experience experiments to explore the regular process of refraction of light, and cultivate general...
"Refraction of Light" Light Phenomenon PPT Courseware 13:
"Refraction of Light" Light Phenomenon PPT Courseware 13 Review: 1. The reflection in the water is the ________ image formed by the Tower Bridge. is formed by ________. 2. What is the reflection of light? The phenomenon that light changes direction after hitting the interface of two media and then returns to the original medium. Question...
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Update Time: 2024-07-06
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