Match List-I with List-II
| List-I | List-II |
| Electromagnetic Waves | Production |
| (A) Radio waves | (I) Vibration of atoms and molecules |
| (B) X-rays | (II) originates from an atomic nucleus |
| (C) \( \gamma \)-radiation | (III) produced by accelerating electrons in a circuit |
| (D) infrared waves | (IV) emitted from heavy atoms |
Choose the correct answer from the options given below.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Each band of the electromagnetic spectrum is produced by a different kind of accelerated charge or energy change.
(A) Radio waves — this matches (III) produced by accelerating electrons in a circuit. Electrons oscillating in an antenna (an LC oscillator circuit) radiate radio waves.
(B) X-rays — this matches (IV) emitted from heavy atoms. X-rays are produced when fast electrons strike a heavy-metal target: the electrons are suddenly decelerated and knock out inner-shell electrons of the heavy atoms.
(C) \( \gamma \)-radiation — this matches (II) originates from an atomic nucleus. \( \gamma \)-rays are emitted when an excited nucleus drops to a lower energy level, as in radioactive decay.
(D) infrared waves — this matches (I) Vibration of atoms and molecules. Hot bodies emit infrared because of the thermal vibration of their atoms and molecules.
NCERT (2026-27):
Gamma Rays – …
