Frequency range for microwaves is

Consider the following
(i) Submarine communications
(ii) A.M. radio
(iii) Shortwave ratio
(iv) Radar

Arrange the above in increasing frequency of the waves associated with them

The electromagnetic wave of wavelength $1500 \mathrm{nm}$ lies in which region of the spectrum?

The wavelength of ${\mathrm{K}}_{\mathrm{\alpha }}$ spectral line is  $\lambda$  for an element of atomic number $46$ . Then the wavelength of$K_{\alpha }$ line for an element of atomic number 28 is:

Match List - I with List - II:

Choose the correct answer from the options given below:

Match List - I with List - II

Frequencies of various radiations are given as

$f_V\to$ Visible light

$f_R\to$ Radio waves

$f_{UV}\to$ Ultra violet waves

Then which of following is true?