MHTCET 13 May 2023 Shift 1 Solved Paper

A spherical surface of radius of curvature ' R ' separates air from glass of refractive index 1.5. The centre of curvature is in the glass. A point object P placed in air forms a real image Q in the glass. The line PQ cuts the surface at point ' O ' and PO=OQ=x. Hence the distance ' x ' is equal to