Match List-I with List-II.
| LIST I | LIST II |
| A. Gamma rays | I. 1 nm to \( 10^{-3} \) nm |
| B. Microwaves | II. 1 mm to 700 nm |
| C. X-rays | III. \( \lt 10^{-3} \) nm |
| D. Infrared waves | IV. 10 mm to 1 mm |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A-III, B-IV, C-I, D-II
In the electromagnetic spectrum the wavelength increases in the order gamma rays, X-rays, ultraviolet, visible, infrared, microwaves, radio waves. The four ranges in List II follow the same order, from the shortest (III) to the longest (IV).
(A) Gamma rays — this matches (III) \( \lt 10^{-3} \) nm. Gamma rays have the shortest wavelengths, below about \( 10^{-3}\,\mathrm{nm} \) (\( 10^{-12}\,\mathrm{m} \)).
(B) Microwaves — this matches (IV) 10 mm to 1 mm. Microwaves lie between about 0.1 m and 1 mm, the longest range in the list.
(C) X-rays — this matches (I) 1 nm to \( 10^{-3} \) nm. X-rays lie between the ultraviolet and the gamma rays.
(D) Infrared waves — this matches (II) 1 mm to 700 nm. Infrared begins just beyond the red end of visible light (700 nm) and extends to the microwaves (1 mm).
NCERT (2026-27):
Gamma Rays – …
