A convex lens of focal length 24 cm `(mu = 1.5) `is totally immersed in water `(mu = 1.33)`. Find its focal length in water.

Explanation

To find the focal length of a convex lens when it is immersed in water, we can use the lens maker's formula. Here’s the step-by-step solution:

### Step 1: Understand the Lens Maker's Formula
The lens maker's formula is given by:
\[ \frac{1}{f} = \left( \frac{\mu_g}{\mu_m} - 1 \right) \left( \frac{1}{R_1} - \frac{1}{R_2} \right) \]
where:
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