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JEE Main20204 Sep 2020Morning ShiftPhysicsElectromagnetic WavesActual

Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum:

Options

  1. Aλ visible < λ micro   waves < λ radio   waves < λ x-rays
  2. Bλ radio   waves > λ micro   waves > λ visible > λ x-rays
  3. Cλ x-rays < λ micro   waves < λ radio   waves < λ visible
  4. Dλ visible > λ x-rays > λ radio   waves > λ micro   waves

Correct answer

B. λ radio   waves > λ micro   waves > λ visible > λ x-rays

Step-by-step solution

First, recall the spectrum of electromagnetic waves, and we know that in the case of electromagnetic waves the frequency is inversely proportional to wavelength. Now from the above spectrum, we can say that, the relations of wavelength, λ radio waves > λ micro waves > λ visible > λ x-rays .

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