Question

A ray incident on a plane mirror at angle i and produced a net deviation of δ between incident ray and reflected ray. Choose the correct graph between the deviation (δ) and incident angle (i).

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Let AO be the incident ray and OB be reflected ray.
According to the law of reflection of light,
Angle of incidence = Angle of reflection
⇒ i = r

∴ Deviation, δ = 180° – 2i
or, δ = –2i + π $e=0ati=\frac{p}{2}$
Comparing it with the standard equation of straight line,
y = mx + c
The graph will be,

Hence, the correct answer is option (d).