During this year, I was studing classic physics again ,which contain mechanics and electrodynamics.They are both irrelevant to thermodynamics,and irrelevant to statistics.(adsbygoogle = window.adsbygoogle || []).push({});

In mechanics ,we have the Newton's laws of motion,which can be in the same form in any inertial system,that is to say , Newton' laws obey Galelo's transformation .

But Einstein found that Maxwell's equations doesn't obey Galelo's transformation,so in classic physics ,Galelo's transformation is not universal.IN Maxwell's theory ,we know that the speed of light is only relevant to the nature of dieletric,it is controdict to the Galelo's transformation.(Yes,The principle of invariability of speed of light is contained in the Maxwell's theory)

There need a principle which is correct in both mechanics and thermodynamics.Lorentz's transformation is obeyed by Maxwell' theory ,but not obeyed by Newton's law.So Newton's law shoud be changed.Einstein gave mass a new meaning and made Newton's law obey The Lorentz's transformation.

So ,the Principle of special relativity is a result from mechanics and electrodynamics,which is not the whole physics,firstly it doesn't contain thermodynamics and it is not statistical.It gives us new conception such as the relativity of time and space.But is temperature relative?Or, is any statistical average relative ? Or can statistical average remove the relativity and arrive pure absolutivity?

Zhang Yang

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Thinking obout The Principle of Special Relativity

**Physics Forums | Science Articles, Homework Help, Discussion**