Lecture20

Lecture20 - % (note the " ~...

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Waves using complex amplitudes We can let the amplitude be complex: where we've separated the constant stuff from the rapidly changing stuff . The resulting "complex amplitude" is: So: ( 29 ( 29 ( 29 { } ( 29 { } , exp ex , ex ( p p ) E x t A i kx t E x t i k t i x A ϖ θ = - - = - - 0 exp( ) E A i = - ←
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Unformatted text preview: % (note the " ~ ") ( 29 ( 29 , exp E x t E i kx t = -% % How do you know if E is real or complex? Sometimes people use the "~", but not always. So always assume it's complex. As written, this entire field is complex!...
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