For a plane electromagnetic wave, the magnetic field at a point and time t is. The instantaneous electric field corresponding to is:
(speed of light )
Step 1: Given data
The magnetic field at a point and time ,
Speed of light
Electric field
Step 2: To find the instantaneous electric field corresponding to
Wave is traveling along axis and is along axis
and are not in the same direction, in Electromagnetic waves and are always perpendicular to each other.
The wavelength is not changed so answers 1 and 3 are incorrect
and are not in the same direction so 2nd is incorrect.
Hence must be along axis then
Therefore the correct answer is Option D