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JEE Advanced 2013 Paper 1

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Question : 8

Total: 60

A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30mW and the speed of light is 3×10‌ms−1 The final momentum of the object is :

0.3×10−17Kg‌ms−1
1.0×10−17Kg‌ms−1
3.0×10−17Kg‌ms−1
9.0×10−17Kg‌ms−1

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