JEE Main 202622 Jan, Morning shiftPhysicsMediumOptics190× since 2002
A parallel beam of light travelling in air (refractive index 1.0) is incident on a convex spherical glass surface of radius of curvature 50 cm. Refractive index of glass is 1.5. The rays converge to a point at a distance cm from the centre of the curvature of the spherical surface. The value of is ______ cm.