In which part of the Earth's atmosphere is the ozone layer located?

$A$ charged particle oscillates about its mean equilibrium position with a frequency of $10^9 \ Hz$. The electromagnetic waves produced:

Match List $I$ with List $II$ of electromagnetic waves with their corresponding wavelength ranges:

List $I$	List $II$
$(A)$ Microwave	$(I)$ $400\,nm$ to $1\,nm$
$(B)$ Ultraviolet	$(II)$ $1\,nm$ to $10^{-3}\,nm$
$(C)$ $X$-Ray	$(III)$ $1\,mm$ to $700\,nm$
$(D)$ Infra-red	$(IV)$ $0.1\,m$ to $1\,mm$

Choose the correct answer from the options given below:

Ozone is found in

The number of wavelengths in the visible spectrum is:

In which one of the following regions of the electromagnetic spectrum will the vibrational motion of molecules give rise to absorption?