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Arrange the following in the ascending order of wavelength : (A) Gamma rays (λ1) (B) x-ray (λ2) (C) Infrared waves (λ3) (D) Microwaves (λ4) Choose the most appropriate answer from the options given below :

1. λ1 < λ3 < λ4 < λ2
2. λ4 < λ3 < λ2 < λ1
3. λ1 < λ2 < λ3 < λ4
4. λ2 < λ1 < λ4 < λ3

Correct answer: λ1 < λ2 < λ3 < λ4

Solution

The correct option is right because it accurately reflects the order of electromagnetic waves from shortest to longest wavelength, with gamma rays having the shortest wavelength, followed by x-rays, infrared waves, and finally microwaves, which have the longest wavelength.

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