Question

If the speed of light were 2/3 of its present value, the energy released in a given atomic explosion will be decreased by a fraction.

• A. 2/3
• B. 4/9
• C. 3/4
• D. 5/9

Answer 1

Answer: (B)

4/9

Answer 2

Energy $\propto c^{2}$; $\therefore$Decrease in energy $\propto \frac{4}{9}$.