explain the formula of the stefan lawstefans lawp

Question

Explain the formula of the Stefan law.

STEFAN'S LAW:

P = σ AT⁴

Here:

P = Power radiated into W (J/s)

σ = Stefan's Constant 5.67 x 10^-8W m^-2K^-4

A = Surface area of body (m²)

T = Temperature of body (K)

Thus the power radiated is proportional to T⁴ for an identical body that describes why the region under the black body curves (the entirety energy) increases too much for a relatively small raise in temperature.