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NEET 2006
Exam
NEET
Year
2006
Subject
Physics
Chapter
Dual Nature of Matter

NEET 2006 · Physics · Dual Nature of Matter

The momentum of a photon of energy 1 MeV in kg m / s will be:

The momentum of a photon of energy 1 MeV\mathrm{MeV} in kgm/s\mathrm{kg} \mathrm{m} / \mathrm{s} will be:

Options

  1. A5×10−225 \times 10^{-22}
  2. B0.33×1060.33 \times 10^6
  3. C7×10−247 \times 10^{-24}
  4. D10−2210^{-22}

Correct answer

A. 5×10−225 \times 10^{-22}

Step-by-step solution

Energy of photon E=1MeVE=1 \mathrm{MeV} Momentum of photon P=ECP=\frac{E}{C}P=EC=1×106×1.6×10−193×108=5×10−22 kg m/s\begin{aligned}P & =\frac{E}{C}=\frac{1 \times 10^6 \times 1.6 \times 10^{-19}}{3 \times 10^8}\\ & =5 \times10^{-22} \mathrm{~kg} \mathrm{~m}/ \mathrm{s} \end{aligned}$$
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