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?
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