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Three stars A, B, C have surface tempera...

Three stars `A, B, C` have surface temperatures `T_(A), T_(B)` and `T_(C)`. A appaears bluish, B appears reddish and C appears yellowish. We can conclude that

A

`T_(A) gt T_(C) gt T_(B)`

B

`T_(A) gt T_(B) gt T_(C)`

C

`T_(B) gt T_(C) gt T_(A)`

D

`T_(C) gt T_(B) gt T_(A)`

Text Solution

Verified by Experts

The correct Answer is:
A
The appearance of a star depends on the wavelength `(lamda_(m))` at which it radiates maximum energy. This depends inversely on the surface temperature (T) of the star. Now, `lamda_("blue") lt lamda_("yellow") lt lamda_("red")`. Thus, star A (bluish) radiates the shortest wavelength and must be at the highest temperature, while star B (reddish) must be at the lowest temperature
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