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NEET 2020 (Phase 1) · Energy Density & Intensity

Energy Density & Intensity question from NEET 2020 (Phase 1)

Q25NEET 2020 · PHASE 1Easy

Energy Density & Intensity

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: (c = speed of electromagnetic waves)

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Answer: (a)

Intensity $I = \langle u \rangle c$ , and the electric and magnetic energy densities are equal.
So each field contributes half of the intensity.
So the answer is (a) 1 : 1.

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