Unformatted text preview: magnetic field magnitude in T is much smaller than the electric field in V/m. See page 1264 for clarification. 3. A sinusoidal electromagnetic wave is traveling in the negative z-direction. What are the possible wave functions for the electric and magnetic fields if the wave is linearly polarized in the x-direction? See page 1264 4. Fig. 32.10 shows one wavelength of a sinusoidal electromagnetic wave at time t = 0. For which values of x between x = 0 and x = λ is the energy density at a maximum? For which values is it at a minimum? For which values of x is the magnitude of the instantaneous (not average) Poynting vector at a maximum? For which values is it at a minimum? Both the energy density u and the Poynting vector magnitude S are max where the electric and magnetic fields have their max magnitudes. This occurs at x = λ/4 & 3λ/4....
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This note was uploaded on 04/18/2008 for the course PHYS 0030 taught by Professor Cutts during the Spring '07 term at Brown.
- Spring '07