Question

The radii of curvature of two convex lenses are 0.5m and 0.05 its refractive index is 1.5. what is its focal length​?

Answer 1

Answer:

Hope u like my process

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The len's maker formula to be used is

Where,

=> f = focal length;

=> R1 and R2 are radius of curvatures

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Given:-

=-=-=-=-=

Thus,

Now,

=-=-=-=

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So the required focal length is

=> 0.101 m, or, 101 cm