# HELP! Boltzmann law in terms of classical physics?

P-Jay1
The Stefan-Boltzmann law is as follows: The energy radiated by a black body radiater per second per unit area is directly proportional to the fourth power of the absolute temperature.

Equation: I = σT^4

Is it possible to explain this law by means of classical physics only? If so, please explain.

## Answers and Replies

Homework Helper
What's your answer to the question ? Yes or no ?

kloptok
I would say no since the Stefan-Boltzmann law is derived from Planck's law of radiation which was found by Planck using a quantum hypothesis. Or really a bit psuedo-quantum, he didn't realise it himself at the time that he had more or less revolutionised physics.

However, it seems that a theoretical value of the Stefan-Boltzmann constant $$\sigma$$ can not be found without the aid of a quantum hypothesis (Planck's radiation law). It can only be measured.