On transistors (in russian): http://www.youtube.com/watch?v=-zTaHEuMgWo&feature=youtu.be
On radiowaves etc. (in russian): www.youtube.com/watch?feature=player_embedded&v=PYojUagEBhA
http://habrahabr.ru/post/192120/ - modulation and sinc function
- Why 2D mathematical string turns into 1D mathematical string in case of a ray of light? Why secondary excitation doesn't span in all the 2D directions, but only along the direction of light ray?
http://habrahabr.ru/post/225583/ - nice paper about theory of hidden variables (in russian).