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What are the apparent and bolometric magnitudes of the following: (a) a solar-like star 100 pc...

What are the apparent and bolometric magnitudes of the following:

(a) a solar-like star 100 pc away,

(b) a 100 Watt lightbulb 10 km away,

(c) a galaxy of 1010 solar-like stars 1 Mpc (1 mega-parsec = 106 pc) away,

(d) a quasar with bolometric luminosity Lbol = 1039 Joules/s 1 Gpc (1 giga-parsec = 109 pc) away. Note that 1 Watt = 1 Joule/s.

Science   Advanced-Physics   
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