Stefan's Law, or the Stefan-Boltzmann Law, states that the energy radiated by a blackbody is proportional to the fourth power of its temperature (T⁴). Therefore, if the Sun's temperature were doubled, it would emit 16 times more energy (2⁴ = 16).

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Stefan's Law Says

Question 66

Multiple Choice

Stefan's Law says:

A) the hotter a star's surface, the bluer it looks to us.
B) E = mc².
C) the energy radiated by a blackbody is proportional to T³.
D) that if the Sun's temperature were doubled, it would give off 16X more energy.
E) that doubling the star's temperature would also double its peak wavelength.

Correct Answer: