Lecture6

Lecture6 - as long as: A cos( ) = B and A sin( ) = C ( , )...

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A simpler equation for a harmonic wave: E ( x,t ) = A cos[( kx – ϖ t ) – θ ] Use the trigonometric identity: cos( z y ) = cos( z ) cos( y ) + sin( z ) sin( y ) where z = k x – t and y = to obtain: E ( x,t ) = A cos( kx – t ) cos( ) + A sin( kx t ) sin( ) which is the same result as before,
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Unformatted text preview: as long as: A cos( ) = B and A sin( ) = C ( , ) cos( ) sin( ) E x t B kx t C kx t =-+-For simplicity, well just use the forward-propagating wave....
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