Concept explainers
(a)
Interpretation:
The star
Concept introduction:
The change in the frequency or wavelength of waves when the source and observer move with respect to each other is known as the Doppler effect. The Doppler effect causes the change in received wavelength of waves as compared to source and the new wavelength is known as the Doppler shifted wavelength.
(b)
Interpretation:
The additional information needed for the calculation of the radial velocity of the star
Concept introduction:
As mentioned in the concept of introduction in part (a).
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