How Do I Perform a Galilei and Lorentz Transform?

[NoLook]

Homework Statement

How do I prove that the wavefront of a spheric light wave (c^2 * t^2 = x^2 + y^2 + z^2 = r^2) is not Galilei-invariant but Lorentz-invariant?

Relevant Equations

c^2 * t^2 = x^2 + y^2 + z^2 = r^2

c^2 * t^2 = x^2 + y^2 + z^2 = r^2

 

[BvU]

Hello @NoLook, !

Execute a Galilei transform and a Lorentz transform -- the formulas should have been in your relevant equations list

But first read the PF guidelines -- the require you make and post your own attempt