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Introductory Physics Homework Help
Calculating EM Wave Intensity
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[QUOTE="Simon Bridge, post: 4344171, member: 367532"] You seem to be trying to use equations without understanding the physics behind them. i.e. the "magnitude of B" will change with position and time ... so which "magnitude" did you pick? Perhaps you mean you used the [i]amplitude[/i] of the wave? Did I read that equation correctly: $$\vec{B} = [B_x\hat{\imath} + B_y\hat{\jmath}]\cos(kz+\omega t)$$... so what is the amplitude of the B field? Why would you have two equations for the same thing that give different values for that thing? Go back to the physics: what is "intensity"? [url]http://physics.bu.edu/~duffy/PY106/EMWaves.html[/url] [/QUOTE]
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Calculating EM Wave Intensity
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