Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Flux density problem

  1. Oct 11, 2003 #1
    I have no ideal how to do this problem. Can someone explain it to me? What formula would i use?

    An isotropic quasimonochromatic point source radiates at a rate of 100 W. What is the flux density at a distance of 1 m? What are the amplitudes of the E and B fields at that point?
  2. jcsd
  3. Oct 12, 2003 #2
    "Isotropic" means that the emitted power is distributed uniformly over a circular shell. In this case, of radius 1m.
    "Quasimonochromatic" means, you may use a harmonic (sinus) wave. Just look up how E and B in such a wave depend on intensity. Key word: Poynting vector.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook