A ray of light strikes a plane mirror at a 45 angle of incidence. The mirror is then rotated by 15 into the position shown in red in the drawing, while the incident ray is kept fixed. (a) Through what angle @ does the reflected ray rotate? (b) What is the answer to part (a) if the angle of incidence is 60 instead of 45? Reflected ray before Incident ray rotation of mirror Reflected ray after 450 rotation of mirror 150 (a) Number i Units (b) Number i Units