Question

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

Options

• X-ray region

• Ultra violet region

• Infrared region

• Visible region

Answer 1

X-ray region

Explanation:

E = `"hc"/lambda`

⇒ λ = `"hc"/"E"`

⇒ λ = `(6.6xx10^-34xx3xx10^8)/(11xx1000xx1.6xx10^-19)`

= 12.4 Å

Which belongs to X-ray region.