A plane electromagnetic wave of wavelength λ has an intensity I . It is propagating along the positive Y - direction. The allowed expressions for the electric and magnetic fields are given by:

Question

A plane electromagnetic wave of wavelength λ has an intensity I . It is propagating along the positive Y - direction. The allowed expressions for the electric and magnetic fields are given by:, E → = 2 I ε 0 c cos 2 π λ y - c t k ^ , B → = + 1 c E i ^, E → = I ε 0 c cos ⁡ 2 π λ y - c t k ^ , B → = + 1 c E i ^, E → = 2 I ε 0 c cos 2 π λ y + c t k ^ , B → = + 1 c E i ^, E → = I ε 0 c cos 2 π λ y - c t i ^ , B → = + 1 c E k ^

MARKS App · Accepted Answer

If E 0 is the amplitude of the electric field then the intensity of the electromagnetic wave is given as I = 1 2 ε 0 E 0 2 × c . From the above relation, we get E 0 = 2 I c ε 0 . The relation between electric and magnetic fields is B 0 = E 0 c . The direction of E → × B → will be along + j ^ .

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