The waves used in telecommunication are

The range of wavelength for ultraviolet is from . . . . . . .

Write the range of ultraviolet waves.

Pick out the longest wavelength from the following types of radiations.

$Ultraviolet$ radiations are used in $LASIK$ surgery.

Electromagnetic waves with wavelengths ranging from $3 \times 10^{-3} \, m$ to $1 \, m$ are used in satellite communication. What is the corresponding frequency range? (Given $c = 3 \times 10^8 \, m/s$)