Question

The two mirrors in the figure below meet at a right angle. The beam of light in the vertical plane P strikes mirror 1 at ? = 35.5

Answer 1

d=1.25/sin(35.5)=2.152m

angle=90-35.5=54.5

Answer 2

If x is the distance:
x = 1.25 / sin(35.5)
= 2.15 m.

(b)
The beam reflects from mirror 1 at 35.5 deg. to the vertical, strikes mirror 2 at 54.5 deg. from below the horizontal, and is reflected at 54.5 deg ,above the horizontal.and goes away from thr mirror