Two perfect blackbodies are kept at different temperatures.

PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

Two perfect blackbodies are kept at different temperatures. (i) Find the ratio of their rates of energy emission per unit area if their temperatures are 800 K800\,\text{K} and 1200 K1200\,\text{K} respectively. (ii) If the cooler body has an area of 2.0 m22.0\,\text{m}^{2}, what must be the area of the hotter body so that both bodies emit the same total radiant power?

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