Question 2 — Fig. 10.22 shows three - Questions at the end of the chapter - Chapter 10 Class 8 - Light: Mirrors and Lenses (Curiosity)

Last updated at July 13, 2026 by

Q 2
Question

Fig. 10.22 shows three situations where a light ray falls on a mirror: (i) along the normal; (ii) the mirror is tilted but the ray still falls along the normal to the tilted surface; (iii) the mirror is tilted and the ray falls at 20° from the normal. Draw the reflected ray in each case. What is the angle of reflection in each case?

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Answer
Angles of reflection: 0°, 0°, and 20°.

Explanation

Case Angle of reflection Reflected ray
(i) Along the normal 0° Goes straight back along the same path.
(ii) Along normal of tilted mirror 0° Goes straight back along the same path.
(iii) 20° from the normal 20° Reflects 20° on the other side of the normal.
When light is along the normal the angle is 0°; at 20° from the normal it reflects at 20°.
← Back to concept: 10.3 What Are the Laws of Reflection?
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