The rest mass of the photon is zero. Explain it. - Vidyadip

Question

The rest mass of the photon is zero. Explain it.

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Answer

Planck believed that the emission of radiation energy or absorption is not continuous but in the form of discrete bundles. Photon is not a matter particle but it is a particle associated with radiation energy. It is also called quantum of energy. Photons are electrically neutral and their rest mass is zero.

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