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\times10^9 m and its mean distance from the earth is 1.5\times10^11m. What is the diameter of the sun’s image on the paper? (2008)

Correct Answer is : 9.2×10−4 m

Class 12 NEET Physics Optics Questions Part 1

Question : 44 of 100

Marks: +1, -0

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 1.39×109 m and its mean distance from the earth is 1.5×1011m. What is the diameter of the sun’s image on the paper?

(2008)

6.5×10−5m
12.4×10−4 m
9.2×10−4 m
6.5×10−4 m

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