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 A Somewhat Urgent Question On Physics: Pulsation
 GAIsweetGAI From Norway, joined Jul 2006, 938 posts, RR: 5Posted Wed Mar 21 2007 02:10:01 UTC (9 years 2 months 1 week 4 days 21 hours ago) and read 2265 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 1, posted Wed Mar 21 2007 02:24:56 UTC (9 years 2 months 1 week 4 days 21 hours ago) and read 2247 times:

 If I interpret correctly, "pulsation" is a French translation of frequency. Omega represents the angular frequency of a wave: (just for reference, "w" is the same as "omega"; well, more or less anyway. The Greek letter "omega" is like a curvy w). w = 2(pi) * f = 2(pi) / T Where f is the frequency of the wave (cycles/second), and T is the period (time it takes to complete one cycle). Other formulas you can find HERE Hope this helps! Good luck!
 Shut up and calculate.
 GAIsweetGAI From Norway, joined Jul 2006, 938 posts, RR: 5 Reply 2, posted Wed Mar 21 2007 02:55:06 UTC (9 years 2 months 1 week 4 days 20 hours ago) and read 2233 times:

I'm nut sure I completely understand what w represents, but this already explains a lot. Thanks!

 "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 Wed Mar 21 2007 03:08:14 UTC (9 years 2 months 1 week 4 days 20 hours ago) and read 2220 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.

 Shut up and calculate.
 KFLLCFII From United States of America, joined Sep 2004, 3433 posts, RR: 24 Reply 4, posted Wed Mar 21 2007 03:36:36 UTC (9 years 2 months 1 week 4 days 20 hours ago) and read 2210 times:

 what he said.
 "About the only way to look at it, just a pity you are not POTUS KFLLCFII, seems as if we would all be better off."
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