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MCQEasyJEE Main 2023 · 30 January, Shift 1Characteristics of EM Waves

Physics Question from JEE Main 2023 · 30 January, Shift 1

A small object at rest absorbs a light pulse of power 20 mW20 \, \text{mW} and duration 300 ns300 \, \text{ns}. Assuming speed of light as 3×108 m/s3 \times 10^8 \, \text{m/s}, the momentum of the object becomes equal to:

  • A

    0.5×10−17 kg m/s0.5 \times 10^{-17} \, \text{kg m/s}

  • B

    2×10−17 kg m/s2 \times 10^{-17} \, \text{kg m/s}

  • C

    3×10−17 kg m/s3 \times 10^{-17} \, \text{kg m/s}

  • D

    1×10−17 kg m/s1 \times 10^{-17} \, \text{kg m/s}

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