RestStar AStar BStar CStar DThe question below refers to the diagram above, showing the same spectral feature as measured in a lab, and in four stars. Wavelength increases to the right.The wavelength of this spectral feature is measured to be 600nm in the lab, and 609 in Star A. What is the radial velocity of Star A? Enter the answer in the boxbelow using km/s, but only enter the number. V.radobsrest.Arest

Given data: The wavelength of spectral in the lab, λrest=600 nm The wavelength of spectral in Star…

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As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5 times as much flux hitting an observer's detector/telescope/eye (i.e. a star with an apparent magnitude of 4 has approximately 2.5 times more flux hitting the detector as a star with an apparent magnitude of 5). With this in mind what is the approximate ratio of the flux hitting the a detector for a star with an apparent magnitude of 3 compared to a star with an apparent magnitude of 7? (hint: remember that magnitudes follow a logarithmic scale, not a linear one)
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