QJEEM20Ph9533: JEE Main 2020 Physics - Class 12 JEEM20Ph9533 Solution: A plane electromagnetic wave is propagating along the direction …

Question

Verified Solution • 2025–26 Session moderate

A plane electromagnetic wave is propagating along the direction

\frac{\hat{i} + \hat{j}}{\sqrt{2}}

, with its polarization along the direction

\hat{k}

. The correct form of the magnetic field of the wave would be (here B₀ is an appropriate constant) :

Accepted Answer

Direction of propagation =

\frac{\hat{i} + \hat{j}}{\sqrt{2}}

Electric field is in direction =

\hat{k}

As

\vec{E} \times \vec{B}

=

\frac{\hat{i} + \hat{j}}{\sqrt{2}}

Propagation direction of

\vec{B} = \frac{\hat{i} - \hat{j}}{\sqrt{2}}

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