easy calc I cant get

[Doctor D]

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What is the freq. of an electromagnetic wave with a wavelength of 3.22mm?

v=fw
3*10^8=.00322f

I keep getting wrong answer for f... I am dumb or is the book an error?

 

[engineeredout]

Maybe you should post the book's answer so we can tell you if its wrong or not

 

[Doctor D]

even problem, what do you get when you crunch the numbers

 

[nfg05]

even problem, what do you get when you crunch the numbers

you've set up the problem correctly, assuming the wave is traveling in a vacuum. If it's an even problem, how do you know you're getting the answer wrong?

 

[ThePandaFactor]

a little less than 10^11 should be close enough

 

[HawkeyePostOp]

What is the freq. of an electromagnetic wave with a wavelength of 3.22mm?

v=fw
3*10^8=.00322f

I keep getting wrong answer for f... I am dumb or is the book an error?

wait, is w here lambda(wavelength) or omega(radian frequency)?

v = f*lambda
w = 2*pi*f

 

[AsuKa]

he's plugging in the wavelength, so i'm assuming he's using

velocity = frequency * wavelength

which in this case should be correct.

 

[ecoli]

This is the reason I only bother doing problems I have the answers for.