Question

The minimum wavelength of photon is $5000\stackrel{\circ }{A}$ , its energy will be

• A. 2.5 eV
• B. 50 V
• C. 5.48 eV
• D. 7.48 eV

Answer 1

The correct option is A 2.5 eV

$E=\frac{12375}{\lambda }=\frac{12375}{5000}=2.47eV\approx 2.5eV$