GAIsweetGAI From Norway, joined Jul 2006, 935 posts, RR: 6 Posted (8 years 3 months 2 weeks 6 days 2 hours ago) and read 1825 times:

I'm doing the physics 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.

"There is an art, or rather a knack to flying. The knack lies in learning how to throw yourself at the ground and miss."

Iamcanadian From Canada, joined May 2001, 734 posts, RR: 1
Reply 3, posted (8 years 3 months 2 weeks 6 days 1 hour ago) and read 1780 times:

Quoting GAIsweetGAI (Reply 3): I'm nut sure I completely understand what w represents

Okay, let's put it this way:

"Light" is a form of electromagnetic radiation (or EMR). There is an EMR scale on which different "kinds" of light lie on. For example, visible light exists at a wavelength of 400 to 700 nanometers. Using the formula:

v = f(lambda)

where v = speed of a wave, f = frequency, lambda= wavelength

We can substitute

w= 2(pi)f => f = w/2pi

=> v = {w(lambda)}/ 2pi

In this case, v= 3 x 10^8 m/s

I hope this helps. Just read up on light waves, and you should be fine.