The star Alpha Centauri A is the same type of star as the Sun, but its luminosity is about 1.6 times that of the Sun. What can we conclude?
A) Alpha Centauri A must have a vastly different interior structure than the Sun.
B) Alpha Centauri A fuses hydrogen into helium in its core at a higher rate than our Sun.
C) Alpha Centauri A has a much higher surface temperature than the Sun.
D) Alpha Centauri A is much farther from Earth than the Sun.
Question 2
Suppose you look at a spectrum of visible light by looking through a prism or diffraction grating. How can you decide whether it is an emission line spectrum or an absorption line spectrum?
A) The only way to decide is to make a graph of the intensity of the light at every wavelength, and then analyze the graph carefully.
B) An emission line spectrum consists of a long bright line, while an absorption line spectrum consists of a long dark line.
C) An emission line spectrum consists of bright lines on a dark background, while an absorption line spectrum consists of dark lines on a rainbow background.
D) The emission line spectrum is produced by electrons jumping up in energy level, while the absorption line spectrum is produced by electrons jumping down in energy level.
Taking off is one of the main times albatrosses use flapping to fly, and is the most energetically d
Artist's rendition of the view from a hypothetical airless planet orbiting Alpha Centauri A
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