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Physics · 2008
NEET 2008 · Prelims · Code A · Q24
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…
A boy is trying to start a fire by focusing Sunlight on a piece of paper using an equiconvex lens of focal length $\displaystyle 10$ cm. The diameter of the Sun is $\displaystyle 1.39 \times 10^9 \mathrm{~m}$ and its mean distance from the earth is $\displaystyle 1.5 \times 10^{11} \mathrm{~m}$. What is the diameter of the Sun's image on the paper ?
Official answer
(2)
$\displaystyle 9.2 \times 10^{-4} \mathrm{~m}$
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NEET (UG) 2008 Physics question, with the answer from NTA’s final answer key. Where our answers come from.