Einstein’s Special Theory of Relativity :: Discussion


2.If the sun radiates energy at the rate of 4 x 1026 Js-1, what is the rate at which its mass is decreasing?
A.5.54 x 109 kgs-1
B.4.44 x 109 kgs-1
C.3.44 x 109 kgs-1
D.2.44 x 109 kgs-1
Answer:  Option  B
Explanation:

As we know from Einstein’s mass energy relation, E = mc2.
Therefore, ΔE= Δmc2
ΔE = 4 x 1026 Js-1, c = 3 x 108 ms-1.
Δm = 4 x 1026 Js-1/ 9 x 1016m2s-2
Δm = 4.44 x 109 kgs-1.

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Published by:Michael Daani

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