A pulse of light of duration... | JEE Advanced 2013 | Modern

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JEE Advance 2013

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Question

A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mV and the speed of light is $3 \times 10 \mathrm{~ms}^{-1}$. The final momentum of the object is :

Select the correct option:

A

$0.3 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}$

B

$1.0 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}$

C

$3.0 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}$

D

$9.0 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}$

✓ Correct! Well done.

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Solution

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JEE Advance

Physics

Easy

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