A light ray of wavelength 589 nm is incident at an angle theta on the top surface of a block of polystyrene a). Find the maximum value of theta for which the refracted ray undergoes total internal reflection at the point P located at the left vertical face of the block. What If?Repeat the calculation for the case in which the polystyrene block is immersed in (b)water and (c)carbon disulfide.Explain your answers.

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