The correct match between the entries in column $I$ and column $II$ is:
$I$ (Radiation) | $II$ (Wavelength)
$(a)$ Microwave | $(i)$ $100 \, m$
$(b)$ Gamma rays | $(ii)$ $10^{-15} \, m$
$(c)$ $A.M.$ radio waves | $(iii)$ $10^{-10} \, m$
$(d)$ $X$-rays | $(iv)$ $10^{-3} \, m$

In the following,List $A$ consists of the wavelength range of different $EM$ waves and List $B$ consists of ways to produce them. Match the following lists.
| List $A$ | List $B$ |
| :--- | :--- |
| $A$. $400 \ nm$ to $1 \ nm$ | $1$. Radioactive decay of the nucleus. |
| $B$. $> 0.1 \ nm$ | $2$. Vibration of atoms and molecules. |
| $C$. $1 \ mm$ to $700 \ nm$ | $3$. Rapid acceleration and deceleration of electrons in aerials. |
| $D$. $< 10^{-3} \ nm$ | $4$. Inner shell electrons in atoms moving from one energy level to a lower level. |

Light of wavelength $1 \,nm$ belongs to the following class of waves:

Infrared rays can be detected by .......

The number of wavelengths in the visible spectrum is:

$TV$ waves have a wavelength range of $1-10 \, m$. Their frequency range in $MHz$ is