Find the radius of curvature of the convex surface of a plano-convex lens, whose focal length is 0.3 m and the refractive index of the material of the lens is 1.5.

Find the radius of curvature of a convex mirror whose focal length is 0.6 m.

The power of a convex lens of focal length 2 m is …………………

Refraction of light is the phenomenon of change in the path of light ray when it goes from one medium to another.The radius of curvature of each face of a convex lens made of glass of refractive index 1.5 is 30 cm. Calculate the focal length of the lens in air.

A convex lens of focal length .f is placed in a medium of refractive index equal to that of lens What happens to its focal length?

The radius of curvature of a convex mirror is 24 cm.What is its focal length?(24 cm,6 cm,12 cm,3 cm)