Question

"The emissive power of a black body varies linearly to the fourth power of its absolute temperature" This statement is called:

• A. Fourier's law
• B. Stefan-Boltzmann law
• C. Kirchhoff's law
• D. Wien's displacement law

Hint:

The Stefan-Boltzmann law is a fundamental principle in thermodynamics and plays a critical role in applications involving radiative heat transfer, such as understanding the thermal radiation of stars, including our sun.

Answer 1

The Correct Option is B

Identifying the correct physical law.
The Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body is directly proportional to the fourth power of the black body's temperature. This is what the statement describes, linking emissive power directly with temperature to the fourth power.