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The sketch given below shows a light ray moving from air into water, at 45º to the normal.
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The sketch given below shows a light ray moving from glass into air, at 30º to the normal.
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Below a light ray is shown moving from air into a glass block, at 40º to the normal. On a sheet of notebook paper, show your partner the actual path the light would take inside the glass.
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Below a light ray is shown moving from water into a rectangular block of air (inside a thin-walled plastic box), at 40º to the normal. On a sheet of notebook paper, show your partner the actual path the light would take inside the air.
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The two transparent blocks are made of different materials. The speed of light in the left block is greater than the speed of light in the right block. On a sheet of notebook paper, show your partner the an appropriate light path through and beyond the right block.
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Light from the air passes through plates of glass and plastic below. The speeds of light in the different materials is shown (these different speeds are often implied by the "Index of refraction" of the material). On a sheet of notebook paper, show your partner a rough sketch showing an appropriate path through the system of four plates.
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Compared to the 50º incident ray at the top, what can you say about the angles of the ray in the air between and below the block pairs? |
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Parallel rays of light are refracted as they change speed in passing from air into the eye. On a sheet of notebook paper, show your partner a rough sketch showing appropriate light paths when parallel light under water meets the same eye.