Class 10

Light – Reflection and Refraction question bank (Science)

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Q1.

Define the principal focus of a concave mirror.

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Q2.

The radius of curvature of a spherical mirror is $20\, cm$. What is its focal length (in $cm$)?

(A)
$5$
(B)
$10$
(C)
$20$
(D)
$40$
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