Question

If the temperature of the Sun were to increase from T to 2T and its radius from R to 2R. The ratio of power, radiated by it would become.

• A. 64 times
• B. 16 times
• C. 32 times
• D. 4 times

Answer 1

Answer: (A)

64 times

Answer 2

Power radiated $= AT^{4}$

Therefore, when radius becomes twice and area a becomes 4 times and temperature T becomes 2T, power radiated $= 4(2)^{4}$Times = 64