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JEE Advance 2013
Paper-1
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.
✗ Incorrect. Try again or view the solution.
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