A black body radiates energy at the rate of 1×10^5 J/(sm)^2 at a temperature of 227°C. The temperature to which it must be heated so that it radiates energy at the rate of 1×10^9 J/(sm)^2.

A black body radiates energy at the rate of 1×10^5 J/(sm)^2 at a temperature of 227°C. The temperature to which it must be heated so that it radiates energy at the rate of 1×10^9 J/(sm)^2.

(a) 5000 K

(b) 5000°C

(c) 500 K

(d) 500°C

The question was posed to me during an online exam.

The origin of the question is Absorption and Emission in section Kinetic Theory of Gases of Engineering Physics I

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A black body radiates energy at the rate of 1×10^5 J/(sm)^2 at a temperature of 227°C. The temperature to which it must be heated so that it radiates energy at the rate of 1×10^9 J/(sm)^2.

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