Question

The energy emitted per second by sun is approximately

• A. $3.8\times {10}^{26}$ Joule
• B. $3.8\times {10}^{14}$ Joule
• C. $3.8\times {10}^{12}$ Joule
• D. $3.8\times {10}^{-26}$ Joule

Answer 1

The correct option is A $3.8\times {10}^{26}$ Joule

Either approach gives us the mass converted per sec $=4.27\times {10}^9$ kg

Using $E=m{c}^2$, the energy emitted per sec by sun $=(4.27\times {10}^9)\times (2.98\times {10}^8{)}^2=3.8\times {10}^{26}$ Joule