01:55
University Physics with Modern Physics
Two plane mirrors intersect at right angles. A laser beam strikes the first of them
at a point 11.5 cm from their point of intersection, as shown in $\textbf{Fig. E33.1}$. For what angle of incidence at the first mirror will this ray strike the midpoint of the second mirror (which is 28.0 cm long) after reflecting from the first mirror?