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.

Options

A. `2//3`
B. `4//9`
C. `3//4`
D. `5//9`

Explanation

As we know that `E=mc^(2)`
`(E_(2))/(E_(1))=(m(2/3c)^(2))/(mc^(2))`[mass remain same]
`(E_(2))/(E_(1))=(4c^(2))/(9c^(2))=4/9`