When a convergent beam of light is incident on a convex mirror, the reflected rays appear to be coming from a point 20\ cm behind the mirror and retrace their path. The focal length of the mirror is

When a convergent beam of light is incident on a convex mirror, the reflected rays appear to be coming from a point…

CBSE Class 10 Science PYQ · Light: Reflection and Refraction · Mirror formula and magnification · 1 Mark · May 2026

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61 Mark · May 2026

When a convergent beam of light is incident on a convex mirror, the reflected rays appear to be coming from a point $20\ \text{cm}$ behind the mirror and retrace their path. The focal length of the mirror is

(a)$20\ \text{cm}$
(b)$10\ \text{cm}$
(c)$40\ \text{cm}$
(d)$30\ \text{cm}$

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(B) / 10 cm (1 Mark)

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When a convergent beam of light is incident on a convex mirror, the reflected rays appear to be coming from a point…

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