The ozone layer blocks radiation of which wavelength?

Which of the following electromagnetic waves has the lowest frequency?

The radiation of frequency $1057 \ MHz$ coming from two close energy levels of hydrogen belongs to which part of the electromagnetic spectrum?

Arrange the following in the ascending order of wavelength $(\lambda) :$
$(A)$ Microwaves $(\lambda_1)$
$(B)$ Ultraviolet rays $(\lambda_2)$
$(C)$ Infrared rays $(\lambda_3)$
$(D)$ $X-$rays $(\lambda_4)$
Choose the most appropriate answer from the options given below $:-$

If wavelengths of visible rays, microwaves, and $X$-rays are $\lambda_v$, $\lambda_m$, and $\lambda_x$ respectively, then which of the following relations is correct?

Infrared radiation was discovered in $1800$ by