The diameter of the flat surface of a circular plano-convex lens is and its thickness…

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

The diameter of the flat surface of a circular plano-convex lens is

6\text{ cm}

and its thickness at the centre is

3\text{ mm}

. The radius of curvature of the curved surface is (1)

15\text{ cm}

(2)

20\text{ cm}

(3)

30\text{ cm}

(4)

10\text{ cm}