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staedtler staedtler
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7 years ago
The following are parameters of stars that astronomers obtained from their measurements. Which of these conclusions is obviously erroneous, based on the positions of these alleged stars on the Hertzsprung-Russell diagram in Fig. 11-8 of Comins and Kaufmann, Discovering the Universe, 7th Ed.? (Ls and Rs are the luminosity and radius of the Sun, respectively.)
A)   Luminosity = Ls, Radius = Rs, Temperature = 6000 K; conclusion: main-sequence star
B)   Luminosity = 104 Ls, Radius = 100 Rs, Temperature = 5000 K; conclusion: a red giant star
C)   Luminosity = Ls, Radius = 1/10 Rs, Temperature = 20,000 K; conclusion: a white dwarf star
D)   Luminosity =1/100 Ls, Radius =1/100 Rs, Temperature =20,000 K; conclusion: a white dwarf star
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Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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7 years ago
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staedtler Author
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7 years ago
On behalf of my study group and I, thank you
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