The H _$\gamma$ Line Has a Wavelength of 434 $\gamma$ Line Appears in a Stars Spectrum at 434

Multiple Choice

The H _$\gamma$ line has a wavelength of 434.0 nm when observed in the laboratory. If the H _$\gamma$ line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?

A) 346 km/s away from the observer
B) 346 km/s toward the observer
C) 1.3*10⁸ m/s away from the observer
D) 1.3*10⁸ m/s toward the observer
E) The radial velocity of the star cannot be determined from this information.