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

Question

Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong ? (A) X-ray region (B) Ultra violet region (C) Infrared region (D) Visible region

Tardigrade Admin · Accepted Answer

E = (hc/λ ) ⇒ λ = (hc/E ) ⇒ λ =(6.6×10-34 ×3×108/ 11×1000×1.6×10-19) = 12.4 mathringA wavelength range of visible region is 4000 mathringA to 7800 mathringA.

Q. Photons of an electromagnetic radiation has an energy $11 k e V$ each. To which region of electromagnetic spectrum does it belong ?

X-ray region

Ultra violet region

Infrared region

Visible region

$E = \frac{h c}{λ} \Rightarrow λ = \frac{h c}{E}$
$\Rightarrow λ = \frac{6.6 \times 1 0 ^{- 34} \times 3 \times 1 0 ^{8}}{11 \times 1000 \times 1.6 \times 1 0 ^{- 19}}$
$= 12.4 \overset{˚}{A}$
wavelength range of visible region is $4000 \overset{˚}{A}$ to $7800 \overset{˚}{A} .$

Q. Photons of an electromagnetic radiation has an energy 11keV each. To which region of electromagnetic spectrum does it belong ?