01 n, A ray of light is incident on an air/water interface. The ray makes an angle of 0, = 45 degrees with respect to the normal of the surface. The index of the air is n, = 1 while water is n, = 1.33. Part (a) Choose an expression for the angle (relative to the normal to the surface) for the ray in the water, 02 02 = asin (sin(6, )"t) n2

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