A narrow beam of light falls on a plane-parallel plate (Fig. 14.6) at point A with coordinate x=O perpendicular to the plate. The refractive index of the plate substance changes according to the formula nx=n0/(1-x/R) where n0 and R are constant values. The beam leaves the plate at point B and angle a to the initial direction. Complete the following tasks and answer the questions: 1. Determine the refractive index nв at point B, at which the beam leaves the plate. 2. Determine the xb coordinate of point B. 3. Determine the thickness of the plate d. Directions. Take n0=1.2, R=13 cm, a=30°.
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