The magnetic field of an electromagnetic wave is given by:
The associated electric field will be :
so use
so
& given direcction of wave
is along
and wave is along
so
should give
option (1)
her & are parallel
So option (1) is wrong
option (2)
But it should be
so option 2 is wrong
option (3)
direction is along
So optiion (3) is correct
Option(4)
but wave is along -k
so option (4) is wrong
Option 1)
Option 2)
Option 3)
Option 4)
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