JEE Main · 2024 · 01 Feb 2024 · Shift 2 · EM Waves

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If frequency of electromagnetic wave is 60 MHz and it travels in air along z direction then the corresponding electric and magnetic field vectors will be mutually perpendicular to each other and the wavelength of the wave (in m ) is :

(A)2.5
(B)10
(C)5✓ Correct
(D)2

Answer: (C)

Solution

For an electromagnetic wave travelling through air, the wavelength is

λ = \frac{c}{f} = \frac{3 \times 1 0 ^{8}}{60 \times 1 0 ^{6}} = 5

JEE Main · 2024 · 01 Feb 2024 · Shift 2 · Single correct option

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