In 1916, he
published the general
theory of relativity Some of
Einstein’s most significant
later contributions are: the
notion 
of 
stimulated
emission introduced in an
alternative derivation of
Planck’s 
blackbody
radiation law, static model
of the universe which
started modern cosmology,
quantum statistics of a gas
of massive bosons, and a
critical analysis of the
foundations of quantum
mechanics In 1921, he was
awarded the Nobel Prize in
physics for his contribution
to theoretical physics and
the photoelectric effect Rationalised 2023-24
283
Dual Nature of Radiation
and Matter
independent of the nature of the material