Encyclopedia > Planck's law

  Article Content

Planck's law

Planck's law is the fundamental law of quantum theory that describes the essential concept of the quanta of electromagnetic energy.

Planck's law states that the energy associated with electromagnetic radiation comes in indivisible packets called quanta. Each such quantum is associated with a single photon. The size E of the quanta depends on the frequency f of the radiation according to the formula

E = hf,
where h is Planck's constant.

Planck's constant is usually given in joule·seconds and the frequency in hertz. Thus, the quantum of energy is usually given in joules.

The product of energy and time is sometimes referred to as action. Hence, h is sometimes referred to as the elementary quantum of action.


Source: from Federal Standard 1037C



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Flapper

... attitude of non-restraint simply could not find a place amid the economic hardships of the 1930s. In many ways, however, the self-reliant flapper had allowed the moder ...

 
 
 
This page was created in 43.1 ms