A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is $ 1.39 \times 10^9m$ and its mean distance from the earth is $ 1.5 \times 10^{11}m$. What is the diameter of the sun's image on the paper ? - Clay6.com, a Free resource for your JEE, AIPMT and Board Exam preparation

A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is $ 1.39 \times 10^9m$ and its mean distance from the earth is $ 1.5 \times 10^{11}m$. What is the diameter of the sun's image on the paper ?