# The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression (x, y) = 10 cos [(6x+8z)] The magnetic field (x, z, t) is given by :(c is the velocity of light) (a) = (6 +8 )cos [(6x−8z+10ct)] (b) (6 −8 )cos[(6x+8z−10ct)] (c) (6 +8 )cos[(6x+8z−10ct)] (d) (6 −8 )cos[(6x+8z+10ct)]

## Question ID - 50259 :- The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression (x, y) = 10 cos [(6x+8z)] The magnetic field (x, z, t) is given by :(c is the velocity of light) (a) = (6 +8 )cos [(6x−8z+10ct)] (b) (6 −8 )cos[(6x+8z−10ct)] (c) (6 +8 )cos[(6x+8z−10ct)] (d) (6 −8 )cos[(6x+8z+10ct)]

3537 =10 cos [(6 +8 ). (x +z )]

=10 cos [ ] =6 +8 ; direction of waves travel.

i.e. direction of ‘c’. ∴ Direction of will be along × = Mag. of will be along × = Mag. of = =  = = Next Question :
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