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Lens Maker's Formula

While calcula...

Question

While calculating the focal length of a lens formula; what is different when the lens is immersed in or surrounded by some other medium than that of air?

A

μ_{1}

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B

μ_{2}

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C

R_{1} & R_{2}

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D

N o n e o f t h e s e

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Solution

The correct option is A $μ_{1}$
In Lens maker's formula;
$\frac{1}{f} = (\frac{μ_{2}}{μ_{1}} - 1) (\frac{1}{R_{1}} - \frac{1}{R_{2}})$
$μ_{1}$ is the R. I of the surrounding; so if the surrounding changes; $μ_{1}$ changes Everything else remains the same.

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