Two identical plates

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

Two identical plates, each of area

0.05\,\text{m}^2

, are kept in vacuum. Plate A has emissivity 0.6 and is at

600\,\text{K}

. Plate B has emissivity 0.8. At what temperature must plate B be kept so that both plates radiate the same power? (a)

650\,\text{K}

(b)

560\,\text{K}

(c)

600\,\text{K}

(d)

520\,\text{K}