An equiconvex lens of refractive index 1.5 has its two surfaces having radius of curvature of 30 cm. A point object has been placed on the principal axis at a distance of 60 cm from the lens. Find the distance of image from the lens formed by the rays which suffer refraction at first surface, reflection at second surface, again a reflection on the first surface and finally a refraction from the second surface.

Answer

`(60)/(13)cm`