A ray of light strikes a plane mirror at an angle of 40- to the mirror surface- What will be the angle of reflection -

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Byju's Answer

Standard X

Physics

Laws of Reflection

A ray of ligh...

Question

A ray of light strikes a plane mirror at an angle of $40^{\circ}$ to the mirror surface. What will be the angle of reflection ?

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Solution

Step 1, Given data and image
Angle made by the ray of light with the surface of the mirror = $40^{\circ}$
We can draw

Step 2, Finding the angle of reflection
Angle made with the mirror surface = 40°
From the figure

Angle of incidence = 90° - 40° = 50°

From the laws of reflection,
angle of reflection = angle of incidence = 50°.
Hence the angle of reflection is 50°.

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A ray of light strikes a plane mirror at an angle of 40∘ to the mirror surface. What will be the angle of reflection ?

A ray of light strikes a plane mirror at an angle of $40^{\circ}$ to the mirror surface. What will be the angle of reflection ?