The correct order of electromagnetic waves with increasing frequency is

$A$ radar sends waves towards a distant object and receives the signal reflected by the object. These waves are:

The approximate height of the ozone layer above the ground is:

The wavelengths of Gamma rays,$X$-rays,and microwaves are respectively $\lambda_r, \lambda_x$,and $\lambda_m$. Then which of the following relations is correct?

How are infrared waves produced?

If microwaves,$X$ rays,infrared,gamma rays,ultraviolet,radio waves and visible parts of the electromagnetic spectrum are denoted by $M, X, I, G, U, R$ and $V$ respectively,then which of the following is the arrangement in ascending order of wavelength?