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# The value of Planck’s constant is ______(A) $6.023\times {{10}^{-34}}$ Js(B) $6.626\times {{10}^{34}}$ Js(C) $6.626\times {{10}^{-34}}$ Js(D) none of these

Last updated date: 14th Sep 2024
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Hint: It is used in the evaluation of the value of energy , when energy of photons is to be calculated in photoelectric effect. It is a constant value.

The value of Planck’s constant is theoretically known, it is $6.626\times {{10}^{-34}}$ .In the quantum of electromagnetism, Planck’s constant is a physical constant that relates the energy carried by single photon to its corresponding frequency or corresponding wavelength. Planck’s constant is defined as A fundamental constant, equal to the energy of a quantum of electromagnetic radiation divided by its frequency.
Note: Value of planck’s constant can be calculated using the slope of the graph with axis e is the electronic charge ($1.6022\text{ }\times \text{ }{{10}^{-19}}\text{ }C$) and c is the velocity of light($2.998\text{ }\times \text{ }{{10}^{8}}\text{ }m/s$).