Question

According to Stefan–Boltzmann Law, if the temperature of a body is doubled (in Kelvin), the heat emitted by it becomes ______.

Options

• 2 times

• 4 times

• 8 times

• 16 times

Answer 1

According to Stefan–Boltzmann Law, if the temperature of a body is doubled (in Kelvin), the heat emitted by it becomes 16 times.

Explanation:

The Stefan–Boltzmann Law states H = σeAT⁴. If T is doubled (2T), the heat emitted becomes σeA(2T)⁴ = 16σeAT⁴, that is, 16 times the original. Heat emission is proportional to the fourth power of absolute temperature.