Question

The H-alpha line has a wavelength in the rest frame of 656.3 nm. If we, on Earth, observe it coming from a white dwarf star with a mass equal to the mass of the Sun and a radius of 10^7 m, what wavelength will be observe? How does that value compare with the speed of motion that gives an equivalent Doppler shift?

Name: the h alpha line has a wavelength in the rest frame of 6563 nm if we on earth observe it coming from a white dwarf star with a mass equal to the mass of the sun and a radius of 107 m what wa 28333
Uploaded: 2023-03-27T15:12:44-08:00
Duration: 1 min 56 s
Channel: Penny Riley
Description: the h alpha line has a wavelength in the rest frame of 6563 nm if we on earth observe it coming from a white dwarf star with a mass equal to the mass of the sun and a radius of 107 m what wa 28333

          The H-alpha line has a wavelength in the rest frame of 656.3 nm.
If we, on Earth, observe it coming from a white dwarf star with a
mass equal to the mass of the Sun and a radius of 10^7 m, what
wavelength will be observe? How does that value compare with
the speed of motion that gives an equivalent Doppler shift?

Added by Alison H.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Penny Riley

03/27/2023

Step 1

First, we need to find the gravitational redshift due to the white dwarf star. The formula for gravitational redshift is: $$z = \frac{\Delta \lambda}{\lambda_0} = \frac{GM}{c^2R}$$ where $z$ is the redshift, $\Delta \lambda$ is the change in wavelength, Show more…

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The H-alpha line has a wavelength in the rest frame of 656.3 nm. If we, on Earth, observe it coming from a white dwarf star with a mass equal to the mass of the Sun and a radius of 10^7 m, what wavelength will be observe? How does that value compare with the speed of motion that gives an equivalent Doppler shift?