Which part of a wave changes when brightness changes?

Explanation is in the file

cutt.ly/nz6VGda

do you have a formula possibly

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.