In the $E.M.$ spectrum,the $X$-ray region lies between which of the following?

The frequency range from $3 \times 10^9 \, Hz$ to $3 \times 10^{10} \, Hz$ is known as:

Which waves are used to destroy cancer cells?

Cellular phones use radio waves to transmit voice communication in the . . . . . . band.

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 |

Both $X$-rays and $\gamma$-rays are electromagnetic waves. Which of the following statements is true for them?