A ray of light traveling in air strikes the surface of a certain plastic slab at 54.9° with respect to the normal in air. It travels in the plastic slab at a 37.5° angle with respect to the normal. Find the critical angle for the plastic in air in degrees.

Q: What is the meaning of physics

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Q: answer is incorrect, it should be option 3

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Q: A moving electric charge produces a magnetic field.

A: An electric charge produces an electric field.

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A: CONCEPT:

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Q: 5 Jlgul Compressive strain is the ratio between decrease in length and original length ylgn O ihi O

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Q: Change in velocity is equal to the area under the v-t graph. O True O False

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