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A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speedoflight is $$3 \times 10^8 ms^{-1}$$. The final momentum of the object is
$$0.3 \times 10^{-17} kg ms^{-1}$$
$$1.0 \times 10^{-17} kg ms^{-1}$$
$$3.0 \times 10^{-17} kg ms^{-1}$$
$$9.0 \times 10^{-17} kg ms^{-1}$$
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