Q. The sun radiates energy at the rate of $3.77 \times 10^{26}J/s.$ The loss of mass it suffers per seconds is
A) $41.9 \times 10^{18}g$
B) $41.9 \times 10^{8}kg$
C) $1.29 \times 10^{16}kg$
D) $1.29 \times 10^{10}kg$
Explanation
(b) According to Einstein’s mass energy equivalence
$E = mc^{2}$
$\therefore$ Loss of mass per second $= \frac{(3.77 \times 10^{26})}{c^{2}}kg$
$= \frac{(3.77 \times 10^{26})}{\left( 3 \times 10^{8} \right)^{2}}kg = 0.419 \times 10^{10}kg = 41.9 \times 10^{8}kg$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.