That person can feel Earth's gravitational field. The theory of special relativity was introduced first and was later considered to be a special case of the more comprehensive theory of general relativity. General relativity is a theory of gravitation that Albert Einstein developed between 1907 and 1915, with contributions from many others after 1915.
However, since Einstein died in 1955, it may still be under copyright in many other countries, for example, those that use ... In 1907, two years after the publication of his theory of special relativity, Albert Einstein came to a key realization: special relativity could not be applied to gravity or to an object undergoing acceleration. Imagine someone inside a closed room sitting on Earth.