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When light propagates in vacuum there is an electric field and a magnetic field. These fields This question has multiple correct options

1. are constant in time
2. have zero average value
3. are perpendicular to the direction of propagation of light
4. are mutually perpendicular

Correct answer: are mutually perpendicular

Solution

In a vacuum, light is an electromagnetic wave with electric and magnetic fields oscillating perpendicular to each other. They are not constant in time, and the statement about zero average value is not the defining property here.

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