Match the List-$I$ with List-$II$. Choose the correct answer from the options given below:

List-$I$	List-$II$
$A.$ Radio-wave	$I.$ Produced by Magnetron valve
$B.$ Micro-wave	$II.$ Due to change in the vibrational modes of atoms
$C.$ Infrared-wave	$III.$ Due to inner shell electrons moving from higher energy level to lower energy level
$D.$ $X$-ray	$IV.$ Due to rapid acceleration of electrons

Which of the following radiations has the shortest wavelength?

The frequency of a wave is $6 \times 10^{15} \text{ Hz}$. This wave is:

Electromagnetic waves with wavelength:
$(i)$ ${\lambda _1}$ is used in satellite communication.
$(ii)$ ${\lambda _2}$ is used to kill germs in water purifiers.
$(iii)$ ${\lambda _3}$ is used to detect leakage of oil in underground pipelines.
$(iv)$ ${\lambda _4}$ is used to improve visibility in runways during fog and mist conditions.
$(a)$ Identify and name the part of the electromagnetic spectrum to which these radiations belong.
$(b)$ Arrange these wavelengths in ascending order of their magnitude.
$(c)$ Write one more application of each.

Electromagnetic radiation used to sterilise milk is

Match the following types of waves with their wavelength ranges:

$i$. Microwave	$(a)$. $700 \ nm$ to $400 \ nm$
$ii$. Visible light	$(b)$. $1 \ nm$ to $10^{-3} \ nm$
$iii$. Ultraviolet	$(c)$. $0.1 \ m$ to $1 \ mm$
$iv$. $X$-rays	$(d)$. $400 \ nm$ to $1 \ nm$