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?
The first dark spot observed on Uranus. Image obtained by the HST ACS in 2006.
Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T
Who's line is it anyway
The surface temperature of the star is 6000 K. At what wavelength is its light output a maximum
Plaque morphology phenotypes observed following simultaneous infection