23. Luminosity of rigel star in orion
constellation is 17000 times that
of our sun. If the surface
temperature of sun is 6000 K,
then the temperature of the star is
about
(a) 18000 K 0) 68500 K
(c) 7000 K (d) 8000 K
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Answer:
68500 K is the surface temperature of star.
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