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You can determine the index of refraction of a substance by determining its critical angle. (a)...

You can determine the index of refraction of a substance by determining its critical angle.

(a) What is the index of refraction of a substance that has a critical angle of 53.4° when submerged in water? (Round your answer to at least two decimal places.) n = What is the substance, based on this table? ---Select--- (diamond,crown glass, flint glass, polystyrene.plexiglass, crystalline quartz, zircon)

(b) What would the critical angle be (in degrees) for this substance in air?

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