1. Tardigrade
  2. Question
  3. Physics
  4. The wavelength of first spectral line of sodium is 5896 overset0 mathopA . What is the first excitation potential of sodium atom:

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The wavelength of first spectral line of sodium is 5896 $ \overset{0}{\mathop{A}}\, $ . What is the first excitation potential of sodium atom:

BVP MedicalBVP Medical 2000

Solution:

First excitation energy of sodium will be $ E=hv=\frac{hc}{\lambda }=\frac{6.63\times {{10}^{-34}}\times 3\times {{10}^{8}}}{5896\times {{10}^{-10}}} $ $ E=0.00337\times {{10}^{-6}}J=3.37\times {{10}^{-19}}J $ $ E=\frac{3.37\times {{10}^{-19}}}{1.6\times {{10}^{-19}}}=2.1eV $ Hence, the first excitation potential of sodium atom is 2.1 volt.