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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) <10⁻¹² nm (iii) Radioactive decay of the nucleus
(d) 1 mm to 0.1 m (iv) Magnetron valve

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

(a)-(i), b(ii), (c)-(iii), (d)-(iv)

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

Solution:

(a) : Waves of 700 nm to 1 mm can be produced by vibration of atoms and molecules (b) : Waves of 1 nm to 400 nm are produced when an electron moves from one energy level to lower level in an atom (c) : Waves of wavelength <10⁻¹² nm can be produced by radioactive decay of the nucleus (d) : Waves of 1 mm to 0.1 m are produced by magnetron valve.