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BoardPhysics

Light Reflection and Refraction

4 Board Physics previous year questions on Light Reflection and Refraction — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.

Q1 FREE PREVIEW
PYQ

The relation between radius of curvature R and focal length f of a spherical mirror is -
[PYQ 2025]

a

\(R=\frac{f}{2}\)

b

\(R=f\)

c

R=2f

d

R=4f

✓ Correct answer: a)

\(R=\frac{f}{2}\)

Explanation

The radius of curvature (R) of a spherical mirror is twice its focal length (f), which can be expressed as the formula R=2f. This means the focal length is half the radius of.
\(f=\frac{R}{2}\).

Q2
PYQ

A man is standing 3 metre away from a plane mirror. The distance between the man and its image in metre will be
[PYQ 2024]

a

1.5

b

6

c

3

d

9

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Q3
PYQ

In the phenomenon of refraction of light, if \(\sin i=a\) and \(\sin r=b\), then refractive index \(\mu\) will be
[PYQ 2024]

a

\(\mu =ab\)

b

\(\mu =\frac{b}{a}\)

c

\(\mu =\frac{a}{b}\)

d

\(\mu =\sqrt{ab}\)

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Q4
PYQ

In the given figure, the value of angle x will be :
[PYQ 2023]

a

\({60}^{∘}\)

b

\({90}^{∘}\)

c

\({45}^{∘}\)

d

\({30}^{∘}\)

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