A spectral line of a certain star is observed to be "red shifted" from a wavelength of 500 nm to a wavelength of 1500 nm.Interpreting this as a Doppler effect, the speed of recession of this star is:
A)0.33c
B)0.50c
C)0.71c
D)0.80c
E)c

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The Answer of A spectral line of a certain star is observed to be "red shifted" from a wavelength of 500 nm to a wavelength of 1500 nm.Interpreting this as a Doppler effect, the speed of recession of this star is:
A)0.33c
B)0.50c
C)0.71c
D)0.80c
E)c

A Spectral Line of a Certain Star Is Observed to Be