Two mirrors meet at right angles. A ray of light is incident on one at an angle of 30°

Two mirrors meet at right angles. A ray of

light is incident on one at an angle of 30° as shown in Fig. 16.19. Draw the reflected ray from the second mirror. 

Answer: Laws of reflection will apply here. Applying triangle law properties, we can easily find out, the emergent ray from mirror B, will reflect at 60 degrees.