A spherical surface of radius of curvature separates air (refractive index 1.0) from…

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A spherical surface of radius of curvature

R

separates air (refractive index 1.0) from glass (refractive index 1.5). The centre of curvature is in the glass. A point object

P

placed in air is found to have a real image

Q

in the glass. The line

PQ

cuts the surface at a point

O

and

PO = OQ

. The distance

PO

is equal to: (1)

5R

(2)

3R

(3)

2R

(4)

1.5R