College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 34

A ray of light strikes a flat, 2.00-cm-thick block of glass ( n = 1.50) at an angle of 30.0° with respect to the normal (Fig. P22.18). (a) Find the angle of refraction at the top surface. (b) Find the angle of incidence at the bottom surface and the refracted angle. (c) Find the lateral distance d by which the light beam is shifted. (d) Calculate the speed of light in the glass and (e) the time required for the light to pass through the glass block. (f) Is the travel time through the block affected by the angle of incidence Explain.