Question

if the angle between reflected ray and the incident ray is 118 then the angle of reflection is =?​

Answer 1

Explanation:

The answer is 60 degrees = angle of incidence = angle of reflection.

To calculate the answer,

Imagine an angle bisector of the 120 degree angle. This becomes your ‘normal’.

(Mathematically, it is supposed to be the line which satisfies the following properties:

90 degree wrt to tangent drawn on the point on which light “bounces”

In the same plane as the incident ray and reflected ray.

Answer 2

Answer:

Angle of reflection = 59°

Explanation:

According to Laws of reflection

• The normal line divides the angle between the incident ray and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection.
• The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection
• Let angle of incidence = i

Angle of reflection = r

Then angle between reflected ray and the incident ray will be i + r which is given to be 118°

but we know i = r

i + r = 118°

Replacing i by r

r + r = 118°

2r = 118°

r = 118÷2

r = 59°