Question

What is the emissive power of sun when its temperature is doubled:

• A. 2 times
• B. 4 times
• C. 8 times
• D. 16 times

Answer 1

Answer: (D)

Emissive power depends upon fourth power of temperature. $E\propto T^4$ If we double the temperature the emissive power will become $24=16$ times.