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Q.

Is it true that blue stars are the coolest stars?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
Blue stars are the hottest stars. Different temperatures of the stars give different colours of the stars. Blue stars are the hottest stars, having a surface temperature of approximately 28000oC. Yellow-white stars are medium-hot stars, having a surface temperature of about 6000oC, and red stars are the coolest stars, having a surface temperature of about 30000C.
The correct statement would be blue stars are the hottest stars.
 
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