Exam (3).pdf - Question Suppose there are three stars in space each moving at 100 km\/s Star A is moving across(i.e perpendicular to our line of sight

Exam (3).pdf - Question Suppose there are three stars in...

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Question: Suppose there are three stars in space, each moving at 100 km/s. Star A is moving across (i.e., perpendicular to) our line of sight, Star B is moving directly away from Earth, and Star C is moving away from Earth, but at a 30° angle to the line of sight. From which star will you observe the greatest Doppler shift? From which star will you observe the smallest Doppler shift? Answer : The expression used to measure Doppler shift at wavelength is, Here, is change in wavelength, is wavelength of light, is radial velocity and is speed of light. Radial velocity is the component of motion of star along the line of
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