Asked by Abe123736 | 13th Dec, 2015, 09:59: PM

Expert Answer:

Angle of incidence (i) + Angle of reflection (r) = 90º  

begin mathsize 14px style straight i. straight e. comma space angle straight i plus angle straight r equals 90 degree end style

But, as per the laws of reflection, i = r 

Therefore, 2 i = 90º

Or, i = r = 45º 

Answered by Faiza Lambe | 14th Dec, 2015, 08:35: AM