Question: A beam of light directed upwards, inside a plastic material with a refractive index of 1.60, strikes an upper horizontal interface (plastic-air) at an angle

A beam of light directed upwards, inside a plastic material with a refractive index of 1.60, strikes an upper horizontal interface (plastic-air) at an angle of 46.

1. Is light transmitted under these conditions?

2.Suppose that now the interface is changed and instead of air there is a liquid whose refractive index is 1.20. In this case, is light transmitted from the plastic to the liquid?

Justify your answer with calculations.

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