M Mimi New member Oct 16, 2009 #1 A star’s spectrum shows the HB spectral line at a wavelength of 475.3 nm. The laboratory wavelength of that line is 486.1 nm. What is the velocity of that star with respect to us, and is it receding or approaching?
A star’s spectrum shows the HB spectral line at a wavelength of 475.3 nm. The laboratory wavelength of that line is 486.1 nm. What is the velocity of that star with respect to us, and is it receding or approaching?
D Delta V New member Oct 16, 2009 #2 The equation is => v = c ( f1 / f2 ) 'v' is velocity of star 'c' is speed of light 'f1' is observed frequency of star 'f2' is laboratory frequency The star is receding from us.
The equation is => v = c ( f1 / f2 ) 'v' is velocity of star 'c' is speed of light 'f1' is observed frequency of star 'f2' is laboratory frequency The star is receding from us.
