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Wave Equation of EM Waves

An electric f...

Question

An electric field $\to E$ and a magnetic field $\to B$ exist in a region. The fields are not perpendicular to each other.

A

This is not possible

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B

No electromagnetic wave is passing through the region.

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C

An electromagnetic wave may be passing through the region

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D

An electromagnetic wave is certainly passing through the region.

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Solution

The correct option is D An electromagnetic wave may be passing through the region
An electromagnetic fields are simply packets of energy moving at a speed of light. The electric and magnetic fields are perpendicular to each other in free space. However in birefringent, dielectric and diamagnetic materials, these are not perpendicular to each other.
Transverse electric (TE) and Transverse Magnetic (TM) waves are examples of waves that do not have these fields perpendicular at all.

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