When a blackbody is heated to a temperature T, its total energy flux per second per unit area F at all wavelengths (where $\sigma$ is a constant) is given by A) F = $\sigma$/T². B) F = $\sigma$T. C) FT = $\sigma$. D) F = $\sigma$T⁴.

Question

Quizplus · Accepted Answer

The correct formula for the total energy flux per second per unit area from a blackbody at temperature T is given by the Stefan-Boltzmann law, which states $F = \sigma T^4$, where $\sigma$ is the Stefan-Boltzmann constant. This matches the structure of choice D, where the temperature $T$ is raised to the fourth power ($T^4$), indicating the correct relationship between the flux $F$ and the temperature $T$.

When a Blackbody Is Heated to a Temperature T, Its σ\sigmaσ

When a Blackbody Is Heated to a Temperature T, Its $\sigma$