Question

In a Plano - convex lens, the curved surface
is silvered and the object is placed in front of
plane surface, then the power of the lens in
terms of refractive index p and radius of
curvature R of the Plano - convex lens is​

Answer 1

Answer:

For planoconvex lens (without its plane surface silvered),

or

When an object is placed in front of the planoconvex lens with its plane face silvered, light rays are : (i) refracted at the convex surface (ii) reflected at the silvered surface and (iii) refracted again at convex surface. If is the effective focal length of the combination, then

(as )

or

Radius of curvature of the concave mirror