Question

Match the Column I with Column II.

Column I		Column II
(i)	Wavelength of sound	(A)	below 20 Hz
(ii)	Wavelength of light	(B)	above 20 KHz
(iii)	Infrasonic waves	(C)	above 30 KHz
(iv)	Ultrasonic waves	(D)	from 1.65 cm to 1.65 m
		(E)	from 4 x 10-7 m to 7 x 10-7m

Answer 1

(i) – (D) 

(ii) – (E) 

(iii) – (A) 

(iv) – (B)