A black body is at 727° C. It emits energy at a rate which

Home » Thermal Physics » Thermal Properties of Matter » Question

A black body is at 727° C. It emits energy at a rate which is proportional to

1. (1000)⁴
2. (1000)²
3. (727)⁴
4. (727)²

Correct Option: A

According to Stefan's law,
E ∝ T⁴
∝ (t + 273)4 K [727°C = (727 + 273)K]
∝ (727 + 273)⁴ K
∝ (1000)⁴ K