Hi All - Here are some review questions I am having trouble with, can you help me?
1) Why are hydrogen lines not seen in the absorption spectra of some stars?
2) A star of low surface temperature surrounded by a higher temperature cloud of gas would show a...
3) Visible absorption lines of elements in a star's spectrum occur because...
5) If you see a continuous spectrum with a spectroscope, then you know that the source of the spectrum is...
6) The pattern and strength of lines in a spectrum of a star allows you to determine the...
7) What is the relation between the apparent magnitude of a star and its color?
8) If a star has a parallax of 0.1 seconds of arc and an apparent brightness of 0.7, what is the absolute magnitude?
9) When light is doppler shifted toward the blue end of the spectrum...
10) In order to evaluate Hubble's constant for distant galaxies, what quantities must you measure?
11) We can use Hubble's Law and the Hubble constant to estimate the age of the universe. In doing so, the larger the value of the Hubble Constant, then the age of the universe is.............
12) Which observed property of the 3K background radiation implies most strongly that it has a cosmic origin?
Thank you!