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A thin convex lens which is made of glas...

A thin convex lens which is made of glass (refractive index 1.5) has a focal length of 20 cm. It is now completely immersed in a transparent liquid having refractive index 1.75. Find the new focal length of the lens.

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To find the new focal length of a thin convex lens when it is immersed in a liquid, we can use the lens maker's formula. Here’s a step-by-step solution: ### Step 1: Understand the lens maker's formula The lens maker's formula for a thin lens is given by: \[ \frac{1}{f} = \frac{\mu_l}{\mu_s - 1} \left(\frac{1}{R_1} - \frac{1}{R_2}\right) \] ...
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