After Einstein discovered General Theory of Relativity in 1915, what major works did he make?

After discover ing the General Theory of Rel ativity in 1 9 1 5 , Albert Einstein made several major works in the field of physics . One of his most significant contributions was his development of the famous equation E = mc ^ 2 , which describes the relationship between mass and energy . He also made important contributions to the development of the photo elect ric effect , for which he was awarded the Nob el Prize in Phys ics in 1 9 2 1 . Additionally , Einstein continued to work on the development of the theory of quantum mechanics , and his ideas in this area had a profound impact on the field . </s>