The H _δ Line Has a Wavelength of 410

question 87

Multiple Choice

The H _δ line has a wavelength of 410.2 nm when observed in the laboratory. If the H _δ line appears in a stars spectrum at 410.0 nm, what is the radial velocity of the star?

• A) 146 km/s away from the observer
• B) 146 km/s toward the observer
• C) 6.0 × 10⁷ m/s away from the observer
• D) 6.0 × 10⁷ m/s toward the observer
• E) The radial velocity of the star cannot be determined from this information.