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

5.33 \times 10^{- 23} k g m / s

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5.33 \times 10^{- 25} k g m / s

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5.33 \times 10^{- 29} k g m / s

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5.33 \times 10^{- 27} k g m / s

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Solution

The correct option is D $5.33 \times 10^{- 27} k g m / s$
Momentum of a photon $= \frac{E}{c} = \frac{10 \times 1.6 \times 10^{- 19}}{3 \times 10^{8}}$

$= 5.33 \times 10^{- 27} k g m / s$

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3.3 \times 10^{- 23} k g m / s

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