Question

The light incident on a smooth reflecting surface undergoes specular reflection. The angle of reflection is 55°. What can you say about the angle of incidence?
a) It's greater than 55°.
b) It's less than 55°. 
c) It's equal to 55°.
d) It could be any angle between 0° to 90°.

Answer 1

The correct answer is letter C. The angle of incidence is equal to 55 degrees. This is because Specular Reflection refers to mirror-like reflection of light or other kinds of waves from a surface. This phenomenon is where light from a single incoming direction is also reflection in a single-outgoing direction.

Answer 2

Answer: The correct answer is option (c).

Explanation:

According Laws of reflection:

1) The angle of incidence is equal to the angle of reflection, ∠i=∠r.

2)The incident ray , reflected ray and the normal drawn to the surface of the mirror (here smooth reflecting surface) all lies in the sample plane.

So, according to the question a light is reflected back at the angle of 55° which means that angle of the incident ray with the reflection surface is 55° .

Hence the correct answer is option(c).