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The electric field part of an electroma...

The electric field part of an electromagnetic wave in a medium is represented by ` E_x=0, `
` Ey =2.5 (N)/(C) cos [( 2pi xx 10^(6) (rad)/( m ) ) t- (pi xx 10^(-2) ("rad")/( s)) x ], E_z=0 `The wave is

A

Moving along x direction with frequency `10^(6)` Hr and wave length 100 m.

B

Moving along x direction with frequency `10^(6)` Hr and wave length 200 m.

C

Moving along -x direction with frequency `10^(6)` Hr and wave length 200 m.

D

Moving along y direction with frequency `2pi xx 10^(6)` Hr and wave length 200 m.

Text Solution

Verified by Experts

The correct Answer is:
B
Here, `omega = 2 xx 10^(8)` and e.m. wave is moving in a directing as `F_1 F_1` is varying with x
Frequency `= (omega )/(2pi) = (2pi xx 10^4)/( 2pi) = 10^6` Hz
Wavelength `= (2pi)/( k) = (2pi)/( pi xx 10^(-11) ) = 200` m
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