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For a black body at temperature 727°C, its radiating power is 60 watt and temperature of surrounding is 227°C. If temperature of black body is changed to 1227°C then its radiating power will be

(a) 304 W

(b) 320 W

(c) 240 W

(d) 120 W

1 Answer

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Best answer

Correct option (b) 320 W

Explanation:

Radiating power of a black body

where σ is known as the Stefan-Boltzmann constant, A is the surface area of a black body  and T is the temperature of the black body and T0 is the temperature of the surrounding.

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