As shown above, a plane mirror is inclined at 30 degrees to horizontal and a horizontal ray is incident on it. What angle does the reflected ray make with the incident ray?

Asked by Aditya Great | 3rd Jun, 2015, 09:44: PM

Expert Answer:

Given that the ray of light is incident at an angle 30° to the mirror. 
If we draw a normal, NN' at the point of incidence, we get
begin mathsize 12px style angle APN apostrophe equals 90 degree space minus space 30 degree space equals space 60 degree end style
Since, angle of incidence = angle of reflection
begin mathsize 12px style angle straight N apostrophe PB equals space 60 degree end style

Answered by Yashvanti Jain | 13th Dec, 2017, 07:18: PM