Question

The energy of an electromagnetic radiation is 13.2keV. This radiation is related to which region of spectrum?

Answer 1

Answer is X-Rays 

Explanation:

As we already know that Energy of electromagnetic radiation depends upon the frquency of radiation.
Enrgy of a photon of EM radiation with frequencyis E=hf
frequency and wave length are related by λf=C
E=hf=hc/λ
λ=hc/E
=1240ev-nm/13.2kev
=1240ev-nm/13.2 x1000ev
=1240/13200=0.093nm
=0.093 nm
As X ray wavelength is in the Range of 0.01nm to 1nm .
Hence answer is Xrays.

Answer 2

$Ans:\boxed{\boxed{\bold{ \text{X-ray}}}}$

you know, the energy of electromagnetic radiation depends upon the frequency of radiation . if frequency is higher then energy of radiation must be higher .
and you know,
the formula ,
$E =\frac{1240}{wavelength(in \: nm)}$
13.2 × 10³ = 1240/λ
λ = 1240/13200 = 0.0939 nm ≈ 0.1nm
you should see the chart of frequency and wavelength of electromagnetic radiations.
what you see, wavelength of frequency belongs to X-ray spectrum . { 1nm - 1pm }

That's why answer is X-ray