The total energy flux F of radiation emitted per unit area by a blackbody (e.g., star) is related to its temperature T and a constant σ by which equation? A)F = σT ⁴ B)FT ⁴ = σ C)F ⁴ = σT D)F = σ /T

Question

Quizplus · Accepted Answer

The correct equation is F = σT^4, which is known as the Stefan-Boltzmann law. This law states that the total energy radiated per unit surface area of a black body across all wavelengths per unit time (also known as the black-body radiant exitance or emissive power), is directly proportional to the fourth power of the black body's thermodynamic temperature T. The constant of proportionality σ is the Stefan-Boltzmann constant.

The Total Energy Flux F of Radiation Emitted Per Unit