A pulse of light of duration 100 ns is absorbed completely by a small object initially at…
Physics · NEET · NTA Exams — Work, Energy and Power
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 speed of light is \(3 \times 10^{\mathrm{a}} \mathrm{~m} / \mathrm{s}\). The final momentum of the object is
- \(0.3 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}\)
- \(1.0 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}\)
- \(3.0 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}\)
- \(9.0 \times 10^{-17} \mathrm{~kg} \mathrm{~ms}^{-1}\)
Answer
(B) 1.0 10^ -17 ~kg ~ms ^ -1
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