Changes

==History==

==History==

It was first used by [[Max Planck]] to explain the radiation curves of black-bodies. He supposed that [[light]] could be modelled as a series of particles (now called [[photons]]), each with an [[energy]] proportional to its frequnecy, <math>\nu</math>. The constant of proportionality was Planck's constant. Mathematically this can be expressed as:

It was first used by [[Max Planck]] around 1900 to explain the radiation curves of black-bodies. He supposed that [[light]] could be modelled as a series of particles (now called [[photons]]), each with an [[energy]] proportional to its frequnecy, <math>\nu</math>. The constant of proportionality was Planck's constant. Mathematically this can be expressed as:

<math>E = h \nu</math>

<math>E = h \nu</math>