<u>Answer:</u> The Einstein's equation is given below.
<u>Explanation:</u>
Nuclear reactions are defined as the reaction in which an alteration in nucleus of an atom takes place. There are two types of nuclear reactions: Nuclear fusion and nuclear fission reactions.
The equation given by Albert Einstein for nuclear reaction is given by:
I would say it should be Einstein's famous equation of e=mc^2 which means energy =mass x the speed of light squared. With this equation Einstein showed that energy comes from a mass travelling at the speed of light squared which is a fundamental equation to explain physical phenomena.