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  • Three stars A, B, C have surface temperature  respectively. Star A appears bluish, star B appears reddish and star C yellow

Three stars A, B, C have surface temperature T_A, T_B, T_C respectively. Star A appears bluish, star B appears reddish and star C yellowish. Hence

Option: 1

T_B> T_C> T_A


Option: 2

T_C> T_B> T_A


Option: 3

T_A> T_C> T_B

 


Option: 4

T_A> T_B> T_C


Answers (1)

best_answer

The appearance of a star depends on the wavelength (λm) at which it radiates maximum energy. 

By Wien's law,

\lambda _{m} \alpha \frac{1}{T}

As \lambda _{blue} < \lambda _{yellow} < \lambda _{red}.

Star A (bluish) radiates the shortest λ and must be at the highest temperature, while star B (reddish) must be at the lowest temperature.

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Rishi

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