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JEE Main202226 Jun 2022Evening ShiftPhysicsElectromagnetic WavesActual

Which is the correct ascending order of wavelengths?

Options

  1. Aλ visible   < λ X - ray < λ gamma - ray   < λ microwave  
  2. Bλ gamma - ray   < λ X - ray < λ visible   < λ microwave  
  3. Cλ X - ray < λ gamma - ray   < λ visible   < λ microwave  
  4. Dλ microwave   < λ visible   < λ gamma - ray   < λ X - ray

Correct answer

B. λ gamma - ray   < λ X - ray < λ visible   < λ microwave  

Step-by-step solution

We know that E = h c λ ⇒ E ∝ 1 λ . Also, E gamma - ray > E X - ray > E visible > E microwave Therefore, λ gamma - ray < λ X - ray < λ visible < λ microwave

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