Calculate equivalent focal length of plano convex lens for following case:-
(i) When curved surface is silvered.
(ii) When plane surface is silvered.

Calculate equalant focal length of plano convex lens for following case :– (i) When curved surface is silvered. (ii) When plane surface is silvered.

A plano-convex lens, when silvered at its plane surface is equivalent to a concave mirror of focal length 28 cm . When its curved surface is silvered and the plane surface not silvered, it is equivalent to a concave mirror of focal length 10 cm then the refractive index of the mateiral of the lens is:

A plano convex lens has focal length f = 20 cm . If its plane surface is silvered, then new focal length will be

A plano convex lens has focal length f = 20 cm . If its plane surface is silvered, then new focal length will be

A plano concave lens is silvered at the plane surface. How does it behave?

A convex lens of focal length 20cm and another plano convex lens of focal length 40cm are placed co-axially . The plano convex lens is silvered on plane surface. What should be the distance (in cm) so that final image of the object 'O' is formed on O itself.

A convex lens of focal length 20cm and another plano convex lens of focal length 40cm are placed co-axially . The plano convex lens is silvered on plane surface. What should be the distance (in cm) so that final image of the object 'O' is formed on O itself.