The waves used in telecommunication are

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

Which electromagnetic waves are used in the medical field to destroy cancer cells?

Practically,the ozone layer absorbs radiations of wavelength:

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 $:-$

What is an ozone hole?