A plane electromagnetic wave travels in free space along the x-direction. The electric field component of the wave at a particular point of space and time is `E=6Vm^(-1)` along y-direction. Its corresponding magnetic field component, B would be :

Options

A. `6 xx 10^(-8) T ` along x - direction
B. ` 2 xx 10^(-8) T ` along y - direction
C. `6 xx 10^(-8) T ` along z - direction
D. ` 2 xx 10^(-8) T ` along z - direction

Answer

D

Explanation

E = BC
`B = (E)/( C) = (6)/( 3 xx 10^(8)) = 2 xx 10^(-8) T hat(k)`
Propagation direction ` = hat(E) xx hat(B) `
`hat(i) = hat(j) xx hat(B)`
`rArr hat(B) = hat(k)`