Question

The angle between incident ray and the reflected ray is 80°. What is the angle of incident?​

Answer 1

Angle between incident Ray and reflected Ray is

$2 \theta \\ \\ and \\ \\ \theta = angle \: of \: incidence = angle \: of \: reflection \\ \\ 2 \theta = {80}^{0} \\ \\ \theta = {40}^{0}$

Angle of reflection = 40 degrees

hope it helps.

Answer 2

Solution :-

As given :-

Angle between incident ray and reflected ray = 80°

First of all

♦ What is incident ray ?

» The ray of light which strikes any surface is called incident ray.

♦ What is reflected ray ?

» The bounce back of incident ray from a reflecting surface is known as reflected ray

♦ What is angle of incident ?

» The angle made by incident ray with the normal of the surface.

♦ What is angle of reflection ?

» The angle made by the reflected ray with the normal of the surface.

♦ Relationship between angle of incident and angle of reflection ?

» Angle of incident = Angle of reflection

Now as

Angle of incident = Angle of reflection

→ Angle of incident + Angle of reflection

= 80°

→ Angle of Incident + Angle of incident

= 80°

→ 2 Angle of incident = 80°

→ Angle of incident = 40°