$TV$ waves range from . . . . . .

Write the range of frequencies of visible light.

Electromagnetic radiation used to sterilise milk is

What protects us from $UV$ light emitted by the Sun?

The frequency range from $3\, MHz$ to $30\, MHz$ is known as:

If $\lambda_r$,$\lambda_v$,and $\lambda_x$ are the wavelengths of red light,violet light,and $X$-rays respectively,then which of the following relations is correct?