Question

Lens made of material of refractive index new one is surrounded by a medium of refractive index new 2 the focal length f is related as

Answer 1

Answer:

Here, we have a thin lens of refractive index μ and focal length f . ... Let, the radii if curvature of the lens be R1 and R2. ... Thus focal length f' of the lens in the medium is given by,