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Question

The light radiations with discrete quantities of energy are called______.

A
electrons
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B
proton
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C
positron
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D
photon
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Solution

The correct option is D photon
According to planck's quantum theory :
The radiant energy emitted or absorbed by a body not continuously but discontinuously in the form of small discrete packets of energy and these packets are called quantum.
In case of light, the smallest packet of energy is called as 'photon' but in general case the smallest packet of energy called as quantum.

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