Momentum of a photon with energy 20, eV is

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11.Dual Nature of Radiation and matter

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The momentum of a photon with energy $20\, eV$ is

A

$10.0 \times {10^{ - 27}}\,\frac{{kg \times m}}{s}$

B

$10.95 \times {10^{ - 27}}\,\frac{{kg \times m}}{s}$

C

$10.66 \times {10^{ - 27}}\,\frac{{kg \times m}}{s}$

D

$10.2 \times {10^{ - 27}}\,\frac{{kg \times m}}{s}$

Solution

$E=\frac{h c}{\lambda}$

$\lambda=\frac{\mathrm{hc}}{\mathrm{E}}$

$\lambda=\frac{\mathrm{h}}{\mathrm{p}}$

$\frac{\mathrm{hc}}{\mathrm{E}}=\frac{\mathrm{h}}{\mathrm{p}}$

$\mathrm{p}=\frac{\mathrm{E}}{\mathrm{C}}$

Standard 12

Physics

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