*Concours Général*in physics on Thursday, and in math on Monday. To prepare, I looked at previous years'

*sujet*'s (I can't find the translation right now), and some talk of a

*pulsation*, omega, in relation to light, that I don't know anything about.

I asked my teacher today and he couldn't come up with a definite answer.

So do any of you know what pulsation is or represents, and what formulas are associated with it?

Thanks for any constructive answers.