Photon is the fundamental unit/quantum of
(A) gravitation
(B) electricity
(C) magnetism
(D) light
Question Asked : SSC Graduate Level Tier-I Exam 2013
Explanation : A photon is an elementary particle, the quantum of light and all other forms of electromagnetic radiation. The modern photon concept was developed gradually by Albert Einstein. A photon a packet of energy that is irradiated by the sun.
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