Hi, I was looking at a basic derivation of the lorentz transformation on youtube. I was wondering at what point do you incorporate the fact that speed of light is same in every reference frame because the guy only uses some algebra on a few equations that come from basic geometry and classical mechanics and the lorentz factor just pops out of nowhere. You could represent a beam of electrons instead with the letter c and you`d still arrive at the same result.(I think) Why is that?(adsbygoogle = window.adsbygoogle || []).push({});

Oh, and can anyone recommend a good site where i can get a well explained and simple derivation of the lorentz transformation for time dilaltion and length contraction?

the video is /watch?v=oLffmNXLjv4

ps you can stop watching aroung 6:00

thanks

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

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!

# Lorentz transformation question

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