Question
Calculating the angle of reflection from a second mirror

What is the angle of reflection from the second mirror?

Answer to question
  • The angle of incidence at mirror A = 70o
  • i = r and so the angle of reflection at mirror A = 70o
  • The angle between the reflected ray and the mirror = 20o. The angle of incidence at mirror B is an alternate angle and so also equals 20o
  • i = r and so the angle of reflection at mirror B = 20o