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Assertion : The energy $(E)$ and momentum $(p)$ of a photon are related by $p=E / c$.
Reason : The photon behaves like a particle.
Options:
Reason : The photon behaves like a particle.
Solution:
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The correct answer is:
If both assertion and reason are true and reason is the correct explanation of assertion
Momentum of a photon is given by
$$
p=h / \lambda \text { (by de Broglie hypothesis) }
$$
Also the photon is a form of energy packet behave as a particle and having energy
$$
E=h c / \lambda
$$
From (i) and (ii), $p=\frac{E}{c}$ or, $\frac{h \mathrm{v}}{c}$.
$$
p=h / \lambda \text { (by de Broglie hypothesis) }
$$
Also the photon is a form of energy packet behave as a particle and having energy
$$
E=h c / \lambda
$$
From (i) and (ii), $p=\frac{E}{c}$ or, $\frac{h \mathrm{v}}{c}$.
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