Question

The angle to which an incident ray at an angle theta deviates on getting reflected from a surface

Answer 1

The angle to which the incident ray at an angle theta deviates on getting reflected from the surface is D = 180 - 2θ.

• The angle between the straight line direction and the reflected ray is called the angle of deviation.
• Deviation angle ' D ' is the deviation of 180 — (A + A) where the angle of incidence and the angle of reflection is respectively. The variance would therefore be D = 180-2θ.

Answer 2

Answer: 180 -2A

Step-by-step explanation: since angle of reflection=angle of incidence

They falls on a straight line so angle of deviation = 180-(A+A) { Linear pair}

Hence angle of deviation = 180-2A