Sir Isaac Newton, and inter-conversion of mass – energy (E=mc2 )

Newton has stated first of all about inter conversion of mass and light energy. Einstein has derived first mathematical equation for the same.


Newton [1] has quoted in his book ‘Opticks’ in 1704 that
"Gross bodies and light are convertible into one another...",

[ 1 ] Sir Isaac Newton, Opticks, pp. CVX (1704; reprinted by Dover Publications, Inc., New York, 1952).
After about 200 years Einstein [2] derived mathematical equation for Newton’s perception i.e. L =dmc2 where L is light energy emitted when mass dm is annihilated and c is speed of light. It is the rarest coincidence in between Newton’s hypothesis and Einstein’s mathematical derivation.

[2] Einstein, A., Annalen der Physik 18, 639 (1905).
Then from dL =dmc2 Einstein speculated dE =dmc2

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Ajay Sharma