Question

4. Find the thermal Doppler line broadening of a spectral line at 500 nm formed in the Sun's photosphere (T = 5400 K). Assume most of the atoms are H atoms with $m_H = 1.67 imes 10^{-31} kg$. Spectral line is broaden to twice the Doppler shift.

          4. Find the thermal Doppler line broadening of a spectral line at 500 nm formed in the Sun's photosphere (T = 5400 K). Assume most of the atoms are H atoms with $m_H = 1.67 	imes 10^{-31} kg$. Spectral line is broaden to twice the Doppler shift.

4. Find the thermal Doppler line broadening of a spectral line at 500 nm formed in the Sun's photosphere (T = 5400 K). Assume most of the atoms are H atoms with mH = 1.67 imes 10^-31 kg. Spectral line is broaden to twice the Doppler shift.

Added by Thomas W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

04/11/2022

Step 1

The Doppler broadening $\Delta \lambda_D$ is given by: \[ \Delta \lambda_D = \frac{\lambda_0}{c} \sqrt{\frac{2kT}{m_H}} \] where $\lambda_0$ is the wavelength, $c$ is the speed of light ($3 \times 10^8 \, \text{m/s}$), $k$ is the Boltzmann constant Show more…

Show all steps