Q. Photons of an electromagnetic radiation has an energy 11keV each. To which region of electromagnetic spectrum does it belong ?
Solution:
E=hcλ⇒λ=hcE
⇒λ=6.6×10−34×3×10811×1000×1.6×10−19
=12.4A˚
wavelength range of visible region is 4000\mathring{A} to 7800\mathring{A}.
