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A light ray of wavelength 589 nm is incident at an angle on the top surface of a block of polystyrene surrounded by air, as shown in Figure P22.

A light ray of wavelength 589 nm is incident at an angle θ on the top surface of a block of polystyrene surrounded by air, as shown in Figure P22.46. (a) Find the maximum value of θ for which the refracted ray will undergo total internal reflection at the left vertical face of the block.Repeat the calculation for the case in which the polystyrene block is immersed in water (c) What happens if the block is immersed in carbon disulfide?

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