Question

Match List-I with List-II :-

List-I EM-Wave	List-II Wavelength Range
(A) Infra-red	(III) 1 mm to 700 nm
(B) Ultraviolet	(II) 400 nm to 1 nm
(C) X-rays	(IV) 1 nm to \(10^{-3}\) nm
(D) Gamma rays	(I) \(<10^{-3}\) nm

Choose the correct answer from the options given below :

• A. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
• B. (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
• C. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• D. (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

Answer 1

The Correct Option is B

The correct matching between the EM waves and their wavelength ranges is as follows:

- (A) Infra-red corresponds to \( 1 \, \text{mm} \) to \( 700 \, \text{nm} \), which is (III).
- (B) Ultraviolet corresponds to \( 400 \, \text{nm} \) to \( 1 \, \text{nm} \), which is (II).
- (C) X-rays correspond to \( 1 \, \text{nm} \) to \( 10^{-3} \, \text{nm} \), which is (IV).
- (D) Gamma rays correspond to wavelengths less than \( 10^{-3} \, \text{nm} \), which is (I).

Thus, the correct matching is:

\[ \text{(A)-(III), (B)-(II), (C)-(IV), (D)-(I)} \]

Infrared radiation has the longest wavelength among the options, while gamma rays have the shortest wavelength, corresponding to their relative energy levels, with gamma rays being the most energetic and infrared the least.