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BITSAT 2011
Exam
BITSAT
Year
2011
Subject
Physics
Chapter
Dual Nature of Matter

BITSAT 2011 · Physics · Dual Nature of Matter

If the energy of a photon is 10 eV , then its momentum is

If the energy of a photon is 10eV10 \mathrm{eV}, then its momentum is

Options

  1. A5.33×10−23kgm/s5.33 \times 10^{-23} \mathrm{ kg} \mathrm{ m} / \mathrm{s}
  2. B5.33×10−25kgm/s5.33 \times 10^{-25} \mathrm{ kg} \mathrm{ m} / \mathrm{s}
  3. C5.33×10−29kgm/s5.33 \times 10^{-29} \mathrm{ kg} \mathrm{ m} / \mathrm{s}
  4. D5.33×10−27kgm/s5.33 \times 10^{-27} \mathrm{ kg} \mathrm{ m} / \mathrm{s}

Correct answer

D. 5.33×10−27kgm/s5.33 \times 10^{-27} \mathrm{ kg} \mathrm{ m} / \mathrm{s}

Step-by-step solution

Momentum of a photon ∝Ec\propto \frac{\mathrm{E}}{\mathrm{c}} =5.33 ×10−27kgms−1\times10^{-27} \mathrm{ kg} \mathrm{ ms}^{-1}
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