Astro C10 Review

Where do the elements heavier than hydrogen and helium come from?

• Stars and Supernovae

• Black Holes

• Big Bang

• Chemical Reactions

What kind of spectrum would a gas cloud have, given that there is a star nearby but not along the line of sight?

• Emission

• Absorption

• Continuous

• Absorption and Continuous

What spectral type of star corresponds to the hottest temperature?

• O

• B

• L

• M

The process by which a photon's energy is given to an electron and the electron changes from one energy level to another.

• Ionization

• Recombination

• Emission

• Absorption

What is the ratio of total luminosity between Star A and Star B, where Star A has a peak wavelength of 750 nm while Star B has a peak wavelength of 500 nm and has a radius that is 4x smaller?

• Star A is 81x brighter

• Star A is 256/81x brighter

• Star B is 256/81x brighter

• Star B is 81x brighter

A blackbody that is a hotter temperature than another blackbody will produce...

• More blue light, less red light

• More red light, less blue light

• More light at all wavelengths

• Less light at all wavelengths

True or False: A photon's speed is dependent on its wavelength in a vacuum

• True

• False

What is believed to be the cause of inflation?

• The universe was 'supercooled' and the energy needed to go somewhere

• An excess of dark energy in the early universe

• Gravity was significantly weaker in the past

• Quantum fluctuations

Which of the following moon phases are NOT able to be observed at sunrise?

• New Moon

• Full Moon

• Waning Crescent

• Waxing Crescent

You observe during a solar eclipse that the positions of stars near the Sun is not quite the same when they are not near the Sun. This is because of...

• Newton's Gravity

• Einstein's General Relativity

• Quantum Mechnanics

• Big Bang Theory