SATHEE: Optics Question 940

Optics Question 940

Question: A concave mirror of focal length f (in air) is immersed in water ( $μ = 4 / 3$ ). The focal length of the mirror in water will be

[MNR 1998]

Options:

A) $f$

B) $\frac{4}{3}$ $f$

C) $\frac{3}{4} f$

D) $\frac{7}{3}$ $f$

Show Answer

Answer:

Correct Answer: A

Solution:

Focal length of the mirror remains unchanged.

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Optics Question 940

Question: A concave mirror of focal length f (in air) is immersed in water ( μ=4/3 ). The focal length of the mirror in water will be

Options:

Answer:

Solution:

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Question: A concave mirror of focal length f (in air) is immersed in water ( $μ = 4 / 3$ ). The focal length of the mirror in water will be