The ratio of contributions made by the electric field and magnetic field components, to the intensity of an electromagnetic wave is (where, c = speed of electromagnetic waves) [NEET 2020]

Question

Accepted Answer

Correct answer: A. (a) Intensity of magnetic field in EM waves, u_ av= 12 B_0^2 _0 Intensity of electric field in EM waves, u_ av^ '= 12 _0E_0^2 or u_ av^ '= 12 _0 (cB_0 )^2 ( ∵E_0=cB_0) or u_ av^ '= 12 B_0^2 _0 ( ∵c= 1 _0 _0) ∴ u_ av^ 'u_ av= 12 B_0^2 _0 12 B_0^2 _0= 11

$The ratio of contributions made by the electric field and magnetic field components, to the intensity of an electromagnetic wave is (where, c = speed of electromagnetic waves) [NEET 2020]$

Solution

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