astronomy help. questions on stars?

K

kerry

New member
Star A has a temperature 1/2 that of star B, but star A is 5 times bigger than star B. Which statement below is correctA) Star A is redder and dimmer than star B.
B) Star A is bluer and dimmer than star B.
C) Star A is redder and brighter than star B.
D) .Star A is redder and brighter than star B.
E) Star A and star B have the same color, but star A is brighter.
 
cooler stars, lower temperature, less luminosity, closer to death. Star A is redder and dimmer than B. Red dwarfs swell while cooling, hence the larger size. Earth will be destroyed when our sun goes to red giant stage. Don't worry, its 5 billion years away :)
 
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