The H line has a wavelength of 434.0 nm when observed in the ...

[ENagel]

The H line has a wavelength of 434.0 nm when observed in the laboratory. If the H 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.

Question 2

Choose the correct word(s) that make the statement true. A (lunar, solar) eclipse occurs when the Moon is (new, quarter, gibbous, full) and the ordering of aligned celestial objects is always Sun, Moon, Earth.
 
  What will be an ideal response?

[coyin]

Answer to Question 1

a

Answer to Question 2

solar, new