Photon of frequency $^{'} v^{'}$ has a momentum associated with it. If $^{'} c^{'}$ is the velocity of light, the momentum is

v / c

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h v c

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h v / c

^{2}

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h v / c

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Solution

The correct option is D $h v / c$
We know that energy of photon is $E = h ν . . . . (1)$
Momentum of photo , $p = m c = m c^{2} / c = E / c$ where $E = m c^{2}$
using (1), $p = h ν / c$

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The correct option is D $h v / c$
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