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JEE PHYSICS MCQ: RAY OPTICS

1 Medium

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Analyzing +4 | -1

Assertion: When a convex lens

\left(\mu_g=3 / 2\right)

of focal length

f

is dipped in water, its focal length becomes

\frac{4}{3} f

.

Reason: The focal length of convex lens in water becomes

3 f

.

View answer and explanation

Correct option: D

If both assertion and reason are false

Option D (If both assertion and reason are false) is correct because the focal length becomes 4f when dipped in water, not

\frac{4}{3}f

or 3f.

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