Optics Question 639

Question: The focal length of a convex lens depends upon

[AFMC 1994]

Options:

A) Frequency of the light ray

B) Wavelength of the light ray

C) Both (a) and (b)

D) None of these

Show Answer

Answer:

Correct Answer: B

Solution:

$ f\propto \frac{1}{\mu -1} $ and $ \mu \propto \frac{1}{\lambda } $



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