Home
Class 12
PHYSICS
A thin plano-convex lens is placed on a ...


A thin plano-convex lens is placed on a plane mirror as shown in the figure. The radius of curvature of curved surface is 40 cm. the refractive index of material of lens `n_(1)=1.5`. The refractive index surrounding is `n_(0)=1.2` An object O starts moving parallel to plane mirror. if final image of object moves with same speed as that of the object initially then distance of object O from the plane mirror is.

A

80 cm

B

120 cm

C

160 cm

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
Since `m=-1` so distance of object from mirror should be `2f_(eq)`
`(-1)/(f_(eq))=((n)/(n_(0))-1)(2)/(R)`
`f_(eq)=80cm`
Promotional Banner

Similar Questions

Explore conceptually related problems

The radius of curvature of the curved surface of a plano-convex lens is 20 cm . If the refractive index of the material of the lens be 1.5 , it will

For a plano convex lens, the radius of curvature of convex surface is 10 cm and the focal length is 30 cm. The refractive index of the material of the lens is

A thin plano-convex lens acts like a concave mirror of radius of curvature 20 cm when its plane surface is silvered. The radius of curvature of the curved surface if index of refraction of its matarial is 1.5 will be

A thin plano-convex lens acts like a concave mirror of radius of curvature 20 cm when its plane surface is silvered. The radius of curvature of the curved surface if index of refraction of its matarial is 1.5 will be

A plano-convex lens is silvered on its plane side. The radius of curvature of the other face is 12cm and the refractive index of the material of the lens is 1.5. An object is placed 24 cm in front of the silvered lens. Where will the image be formed?

The radius of curvature of the convex face of a plano convex lens is 12cm and the refractive index of the material of the lends 1.5. Then, the focal length of the lens is

The radius curvature of each surface of a convex lens of refractive index 1.5 is 40 cm. Calculate its power.

A convex mirror of focal length f produced an image (1//n)^(th) of the size of the object. The distance of the object from the mirror is

The radius of curvature of the convex surface of a thin plano-convex lens is 12 cm, and the refractive index of its material is 1.6. What is the power of lens ?

The effective focal length of the lens combination shown in figure is -60 cm. The radius of curvature of the curved surfaces of the plano-convex lenses are 12 cm each and refractive index of the material of the lens is 1.5. The refractive index of the liquid is