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Wave Speed Equation

I was hoping somebody could help me with the "wave speed" equation relating to the EM spectrum.

The equation is:
Speed = Frequency x wavelength (v=fλ)

I believe the speed of all EM waves is 3 x 108

this all seems simple enough, however i find putting this into practice somewhat complicated.

For instance; "A radio frequency has a frequency of 92.2 x 106 Hz. Find its wavelength" How would I go about tackling such a question? If anybody could give me a step by step guide I'd be eternally greatful!

Thanks
 

Answers and Replies

cristo
Staff Emeritus
Science Advisor
8,056
72
Well, rearrange the equation, to give [itex]\lambda=\frac{v}{f}[/itex], then plug in the numbers.
 
Hmmmm.....

Thanks, but what exactly must I do. Any chance of a step by step guide of how you'd do it?
 
cristo
Staff Emeritus
Science Advisor
8,056
72
Well, that pretty much tells you! You rearrange the formula, then put in the value of v and the value of f. You divide the value of v by the value of f and you have [itex]\lambda[/itex]. What particular part don't you understand?
 
Thanks, I think I was just going through a phase of thinking too hard without taking a step back and lookinga at the bigger picture. I fully understand now!
 
I am sorry for interuptting but i am now starting physics in form 4 but don't seem to understand .....watching the question you used as a example ...what is v then
 
212
0
v is the velocity of the wave, which for any electromagnetic wave (light, radio, micro, gamma, etc) is c, the speed of light (3x10^8 m/s).
 
orrr ok...thankssss....now understand.....
 

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