What is the frequency range of $AM$ radio waves?

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

Microwaves are used in the following:

Ozone is found in

Match the electromagnetic radiations given in List-$I$ with their uses given in List-$II$.
| List-$I$ | List-$II$ |
| :--- | :--- |
| $A$) $X$-rays | $P$) Remote switches |
| $B$) $UV$-rays | $Q$) Finger prints in forensic labs |
| $C$) Radio waves | $R$) Crystal structure study |
| $D$) $IR$-rays | $S$) $TV$ communication system |

Which of the following electromagnetic waves has the longest wavelength?