Question

Two plane mirrors intersect at an angle of 0-50.2 degrees, as shown below. A light ray is incident on one of the mirrors at an angle of a = 24 degrees. Calculate the angle φ between the incident and outgoing rays. 100.4° Submit Answer You have entered that answer before Incorrect. Tries 4/8 Previous Tries

Answer 1

theta = 50.2 degree alpha = 24 degree In the figure above, A = 90 degree + alpha - theta A = 90 degree + 24 degree - 50.2 degree = 63.8 degree B = 180 degree - [180 degree - phivariant + 2 alpha] B = phivariant - 2 alpha phivariant = B - 2 alpha phivariant = B + 2 alpha 52.4 degree + 2(24 degree) 100.4 degree

I also get 100.4 degrees and I think it is correct. May be the system has some issues.