The block of glass (n = 1.5) shown in cross section in Fig. 32-51 is surrounded by air. A ray of lig

The block of glass (n = 1.5) shown in cross section in
Fig. 32-51 is surrounded by air. A ray of light enters the
block at its left-hand face with incident angle θ1 and
reemerges into the air from the right-hand face directed
parallel to the block's
base. Determine θ1