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-------------------------------- ℙ𝕝𝕒𝕟𝕔𝕜'𝕤 ℚ𝕦𝕒𝕟𝕥𝕦𝕞 𝕋𝕙𝕖𝕠𝕣𝕪 -------------------------------- ❖ Substances that absorb or emit light discontinuously in the form of small packets or bundles.

❖ The smallest packet of energy is called quantum (plural quanta).

❖ The radiation is propagated in the form of waves.

❖ The energy of a quantum is directly proportional to the frequency of the radiation

            E ∝ v             E = hv             E = (hc)/ λ =hc v Where E = Energy of radiation              h = Planck's constant                 = 6.626 * 10^-27 * erg .sec                 = 6.626 * 10^-34 Joule.sec

❖ A body that can absorb or emit energy in whole number multiple of quantum.

            E = nhv Where n = 1, 2, 3, 4

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