Is it true that blue stars are the coolest stars?

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True

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

2800 0^{o} C

. Yellow-white stars are medium-hot stars, having a surface temperature of about

600 0^{o} C

, and red stars are the coolest stars, having a surface temperature of about

300 0^{0} C

.
The correct statement would be blue stars are the hottest stars.

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