12:00 AM, November 13, 2012 / LAST MODIFIED: 12:00 AM, November 13, 2012

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What is planck's constant?

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Planck's constant, (symbol h), fundamental physical constant characteristic of the mathematical formulations of quantum mechanics, which describes the behaviour of particles and waves on the atomic scale, including the particle aspect of light.
The German physicist Max Planck introduced the constant in 1900 in his accurate formulation of the distribution of the radiation emitted by ablackbody, or perfect absorber of radiant energy. The significance of Planck's constant in this context is that radiation, such as light, is emitted, transmitted, and absorbed in discrete energy packets, or quanta, determined by the frequency of the radiation and the value of Planck's constant.

Source: Encyclopedia Britanica

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