Ncert Exercises & Solutions

Match the following:

	Column I (Types of Wave)		Column II (Corresponding Frequency)
A.	X-rays	1.	$v = 10^{0} - 10^{4}$ $Hz$
B.	Ultraviolet wave (UV)	2.	$v = 10^{10}$ $Hz$
C.	Long radio waves	3.	$v = 10^{16}$ $Hz$
D.	Microwave	4.	$v = 10^{18}$ $Hz$

Name	Frequency	Uses
A. X-rays	$2 \times 10^{16} - 3 \times 10^{19}$ $Hz$	Medical pictures, medical testing
B. Ultraviolet wave (UV)	$7.9 \times 10^{14} - 2 \times 10^{16}$ $Hz$	Germicidal lamp
C. Long radio waves	$10^{0} - 10^{4}$ $Hz$	Signal transmission
D. Microwave	$1 \times 10^{9} - 5 \times 10^{11}$ $Hz$	Cooking radar