Question

Match List I (Wavelength range of electromagnetic spectrum) with List II. (Method of production of these waves) and select the correct option from the options given below the lists.

	List I		List II
(a)	700 nm to 1 mm	(i)	Vibration of atoms and molecules.
(b)	1 nm to 400 nm	(ii)	In atoms moving from one energy level to a lower level.
(c)	$<{10}^{-3}nm$	(iii)	Radioactive decay of the nucleus.
(d)	1 mm to 0.1 m	(iv)	Magnetron valve.

• A. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
• B. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
• C. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
• D. (a)-(i), b(ii), (c)-(iii), (d)-(iv)

Answer 1

The correct option is D (a)-(i), b(ii), (c)-(iii), (d)-(iv)

(a) : Waves of $700$ nm to $1mm$ can be produced by vibration of atoms and molecules.

(b) : Waves of $1nm$ to $400mm$ are produced when an electron moves from one energy level to lower level in an atom.

(c) : Waves of wavelength $<{10}^{-3}$ nm can be produced by radioactive decay of the nucleus.

(d) : Waves of $1mm$ to $0.1m$ are produced by magnetron valve.