Term
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Definition
| By vibrating electric charges in atoms. |
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Term
| What direction does light travel in? |
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Definition
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Term
| The main producers of light are _______? |
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Definition
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Term
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Definition
| The bending of a light ray as it passes into a substance. |
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Term
- When light passes from a less dense to more dense medium, it ______________.
- When light passes from a more dense to less dense medium, it ______________.
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Definition
- Bends TOWARDS the normal. (eg. air -> water)
- Bends AWAY from the normal. (eg. water -> air)
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Term
| When light rays hit the surface at right angles, the ray __________? |
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Definition
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Term
- In a CONVEX lens, the lights rays in a beam ________.
- In a CONCAVE lens, the light rays in a beam ________.
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Definition
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Term
| What is "refractive index"? |
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Definition
| The measure of speed of light in a substance. |
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Term
- The angle between the light ray and the normal (as it LEAVES a medium), is called the ___________.
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The angle between the light ray and the normal (as it ENTERS a medium), is called the ___________.
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Definition
- Angle of incidence
- Angle of refraction
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Term
| The angle of refraction is always _______ the angle of incidence. |
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Definition
| Less than. (angle of refraction < angle of incidence) |
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