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Energy in electromagnetic waves

  • Thread starter map7s
  • Start date
  • #1
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Homework Statement



Find the electric and magnetic field amplitudes in an electromagnetic wave that has an average energy density of 3.0 J/m3.

Homework Equations



u=1/2 eo E^2 + 1/(2uo) B^2
u=eo E^2
u=B^2 /uo

The Attempt at a Solution



I tried using these equations, but I wasn't getting the right answer. Do I have to change the units or am I just using the wrong equations?
 

Answers and Replies

  • #2
146
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just kidding...I figured it out :)
 
  • #3
how do you do it?!
 

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