A plano - convex lens is made of flint glass. Its focal length is

A plano convex lens made of glass (n=1.5) has a focal length 10.0 cm. (i) calculate the radius of curvature surface. (ii) If an identical plano-convex lens is placed in contact with the first (plane surface facing each other), What will be the power of the combination ( in diopter) ? (b) An astronomical telescope consists of two convex lenses having focal length 80 cm and 4 cm. When it is normal adjustment, what is its : (i) length (ii) Magnifying power ?

The radii of curvatures of both surfaces of a double convex lens made of glass, (mu = 1.5) is R. Its focal length is

Focal length of convex lens made up of flint glass is 12 cm. It is placed in contnat with a concave lens made up of crown glass to remove chrmoatic aberration. If ratio of dispersive powers of flint of crown glass is frac(3)(2) then focal length of concave lens is

Radius of curvature of plano-convex lens is 10 cm. If its focal length is 30 cm, then its refractive index will be .......

A plano-convex lens is made of glass of refractive index 1.6. the radius of curvature of its curved surface is 30 cm. What is the focal length of the lens ?

The dispersive power of crown and flint glasses are "0.02" and "0.04" respectively.What is the focal length of a convex lens of crown glass which makes an achromatic doublet with a concave lens of flint glass of focal length 80cm

A plano-convex lens is made of refractive index 1.6.If the radius of curvature of the curved surface is 60 cm,then focal length of the lens is:

A convex lens made of glass has focal length 0.15 m in air. If refractive index of glass is 3//2 and that of water is 4//3 , the focal length of lens when immersed in water is

A convex lens made of glass has focal length 0.15 m in air. If the refractive index of glass is 3/2 and that of water is 4/3, the focal length of lens when immersed in water is