Question

The spectrum of a distant galaxy shows the Hα line of hydrogen (λrest = 0.656 microns) at a wavelength of 0.9840 microns. This corresponds to a redshift of z = 0.50 and a recessional speed of vr = 0.38c. What is the distance to this galaxy in Mly?

Name: the spectrum of a distant galaxy shows the h line of hydrogen rest 0656 microns at a wavelength of 09840 microns this corresponds to a redshift of z 050 and a recessional speed of vr 038 c w 81274
Uploaded: 2022-04-08T15:57:20-08:00
Duration: 4 min 9 s
Channel: Shaiju T
Description: the spectrum of a distant galaxy shows the h line of hydrogen rest 0656 microns at a wavelength of 09840 microns this corresponds to a redshift of z 050 and a recessional speed of vr 038 c w 81274

          The spectrum of a distant galaxy shows the Hα line of hydrogen (λrest = 0.656 microns) at a wavelength of 0.9840 microns. This corresponds to a redshift of z = 0.50 and a recessional speed of vr = 0.38c. What is the distance to this galaxy in Mly?

Added by Aurora J.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Shaiju T

04/08/2022

Step 1

We have the rest wavelength of the Hα line, \(\lambda_{\text{rest}} = 0.656\) microns, and the observed wavelength, \(\lambda_{\text{obs}} = 0.9840\) microns. The redshift \(z\) is given as 0.50, and the recessional speed \(v\) is 0.38 times the speed of light Show more…

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The spectrum of a distant galaxy shows the Hα line of hydrogen (λrest = 0.656 microns) at a wavelength of 0.9840 microns. This corresponds to a redshift of z = 0.50 and a recessional speed of vr = 0.38c. What is the distance to this galaxy in Mly?