Match List - I with List - II.

List-I	List-II
(a) Source of microwave frequency	(i) Radioactive decay of nucleus
(b) Source of infrared frequency	(ii) Magnetron
(c) Source of Gamma Rays	(iii) Inner shell electrons
(d) Source of X-rays	(iv) Vibration of atoms and molecules
	(v) LASER
	(vi) RC circuit

Choose the correct answer from the options given below:

We need to match each type of electromagnetic radiation with its source.

(a) Microwaves are generated by a magnetron, which is a vacuum tube device that produces coherent microwave radiation using the interaction of electrons with a magnetic field. So (a) matches with (ii).

(b) Infrared radiation is produced by the vibration of atoms and molecules. When atoms and molecules vibrate, they emit electromagnetic radiation in the infrared region. So (b) matches with (iv).

(c) Gamma rays originate from the radioactive decay of nuclei. During nuclear transitions, the nucleus releases very high energy photons known as gamma rays. So (c) matches with (i).

(d) X-rays are produced when high-energy electrons knock out inner shell electrons from atoms. The transition of outer electrons to fill these inner shell vacancies releases X-ray photons. So (d) matches with (iii).

The correct matching is (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii).