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The electric field part of an electromagnetic wave in a medium is represented by E_(x) = 0,E _(y)= 2.5 (N)/( C) cos [(2 pi xx 10^(6) rad/s ]t - ( pi xx 10^(-2) (rad)/m) x]E_(z) = 0 The wave is |
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Answer» moving along the + xdireaction with FREQUENCY ` 10^(6)` Hz and wavelength 100 m . ` E_(y) = 2.5 N/C cos [(2PI xx 10^(6) (rad)/s) t - ( pi xx 10^(-2) (rad)/m)x]` This SHOWS that the wave is propagating along + direction. Comparing the givenequation with ` E_(y) = E_(0)cos(omegat - kx),`we get ` omega =2 pi xx 10^(6) or v = 10^(6) Hz ` ` and k = pi xx 10^(6) or 2 pi v= 10^(-2) m ` `or lamda= ( 2pi)/( pi xx 10^(-2)) = 200 m` |
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