"A man should look for what is, and not for what he thinks should be."
Einstein, a German physicist, is best known for his theory of relativity and specifically
mass–energy equivalence, expressed by the equation E = mc2. Einstein received the
1921 Nobel Prize in Physics "for his services to Theoretical Physics, and especially for
his discovery of the law of the photoelectric effect. Einstein's many contributions to
physics include his special theory of relativity, which reconciled mechanics with
electromagnetism, and his general theory of relativity, which was intended to extend the
principle of relativity to non-uniform motion and to provide a new theory of gravitation.
His other contributions include advances in the fields of relativistic cosmology, capillary
action, critical opalescence, classical problems of statistical mechanics and their
application to quantum theory, an explanation of the Brownian movement of molecules,
atomic transition probabilities, the quantum theory of a monatomic gas, thermal
properties of light with low radiation density (which laid the foundation for the photon
theory), a theory of radiation including stimulated emission, the conception of a unified
field theory, and the geometrization of physics. Einstein published over 300 scientific
works and over 150 non-scientific works. The physics community reveres Einstein, and
in 1999 Time magazine named him the "Person of the Century". In wider culture the
name "Einstein" has become synonymous with genius.