Photons of an electromagnetic radiation has an energy \(11\, keV\) each. To which region of electromagnetic spectrum does it belong ?

\(\Rightarrow \lambda=\frac{6.6 \times 10^{-34} \times 3 \times 10^{8}}{11 \times 1000 \times 1.6 \times 10^{-19}}\)

\(=12.4 \,\mathop A\limits^o \)

\(\underrightarrow {Increasing{\text{ }}order{\text{ }}of{\text{ }}frequency}\)

\(x-\) rays, \(u-v\) rays, visible, infrared

wavelength range of visible region is \(4000 \,\mathop A\limits^o \) to \(7800 \,\mathop A\limits^o \)