STRING THEORY
We humans are so curious and we want to know more and more about this universe.Like that we want to also know about how this universe made or how this universe works?and also ,many more.To know about this universe,we are using two theories: 1) GENERAL THEORY OF RELATIVITY 2) QUANTUM FIELD THEORY To know about very big objects like stars,planets and milkyways we are using general theory of relativity where at atomic and sub atomic level to know about structure of any matter we use quantum field theory.This both theory work perfectly in their domain like if we want to know about any big object we have to use general theory of relativity and if we want toknow about and small object we have to use quantum field theory but we want to know that why we have to use two different theories can any theory explain almost all objects(big and small) in this universe so scientists have made a theory called STRING THEORY.this theory said many things about quantum gravity,multiple dimension
