Question

Arrange the following in the ascending order of wavelength:
(A) Gamma rays ($\lambda_1$)
(B) X-ray ($\lambda_2$)
(C) Infrared waves ($\lambda_3$)
(D) Microwaves ($\lambda_4$)
Choose the most appropriate answer from the options given below:

• A. $\lambda_4<\lambda_3<\lambda_1<\lambda_2$
• B. $\lambda_4<\lambda_3<\lambda_2<\lambda_1$
• C. $\lambda_1<\lambda_2<\lambda_3<\lambda_4$
• D. $\lambda_2<\lambda_1<\lambda_4<\lambda_3$

Answer 1

The Correct Option is C

The wavelength order for different types of electromagnetic waves from shortest to longest is as follows:

1. **Gamma rays** (λ₁) have the shortest wavelength.
2. **X-rays** (λ₂) have a slightly longer wavelength than gamma rays.
3. **Infrared waves** (λ₃) have a longer wavelength than X-rays.
4. **Microwaves** (λ₄) have the longest wavelength among these options.

Therefore, the ascending order of wavelength is:
λ₁ < λ₂ < λ₃ < λ₄.

Answer: λ₁ < λ₂ < λ₃ < λ₄