Photon Dual Nature of Radiation and Matter Class 12th Physics

Who discovered the concept of photon?

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Aadit Singh Uppal | Contributor-Level 10

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Numerous scientists contributed to the discovery of this concept, but the key was introduced by Albert Einstein in 1905. This concept was used to support the experiment of the photoelectric effect to prove that light could be as a wave too. Then this name photon was given 21 years later, in 1926 by

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Yes, they travel in a vacuum at the speed of light and can never be in still position. This is because they do not have any mass to do so and will not exist only if not in motion.

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A photoelectric effect supports quantum nature of light because :

A. There is a minimum frequency of light below which no photoelectrons are emitted.

B. The maximum kinetic energy of photo electrons depends only on the frequency of light and not on its intensity

C. Above thresold frequency even when the metal surface is faintly illuminated, the photoelectrons leave the surface immediately

D. Electric charge of photoelectrons is quantized

In the above true statement is :-

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Physics Dual Nature of Radiation and Matter 2021

Physics Dual Nature of Radiation and Matter 2021

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