A steel plate behaves like a grey body with emissivity 0.40 at 500 K

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A steel plate behaves like a grey body with emissivity 0.40 at 500 K. Assuming its emissivity remains unchanged, at which temperature (nearest value) will the plate radiate three times as much power per unit area as before? (a) 866 K866\text{ K} (b) 630 K630\text{ K} (c) 1580 K1580\text{ K} (d) 395 K395\text{ K}

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