A star radiates most strongly at 400 nm. What is its surface temperature?
A) 483 K
B) 4,830 K
C) 7,250 K
D) 72,500 K

Question

Quizplus · Accepted Answer

Wien's displacement law states that the wavelength of maximum emission of a blackbody is inversely proportional to its temperature. The higher the temperature, the shorter the wavelength of maximum emission. Therefore, a star that radiates most strongly at 400 nm has a higher surface temperature than a star that radiates most strongly at a longer wavelength. The correct answer is C) 7,250 K.

A Star Radiates Most Strongly at 400 Nm