sine wave diagram

public domain image via Wikipedia Creative Commons

 

 

 

 

 

 

 

 

sine wave animation

public domain image via Wikipedia Creative Commons

 

 

 

 

 

 

 

 

EM_Spectra_NASA_image

public domain image from NASA via Wikipedia Creative Commons

 

 

 

 

 

 

© R A Paselk

Last modified 11 March 2013