In: Physics
At its weak limit, general relativity leads to
Newtonian gravity. Indicate to
minus three physical observations why this does not mean that
general relativity
is not more general than Newton's theory
Newton's Theory of Gravity says that gravitational forces exist like other forces and explains motion under this force. But It does not interprete the origin of Gravity. He himself stated in his book that he does not know the origin of the gravitational force and leaved the task to the reader.
On the other hand Einstein's General Theory of Relativity explained the origins of the Gravitational Force along with its precise working. The General Theory of Relativity is considered to be more accurate and correct and it has replaced Newton's theory of gravity as a more general theory because of some vital observations where general relativity gives precise results but newtonian mechanics fails to do so.
1) Newton's Theory of Gravity was not able to explain the precession of the perihelion of Mercury, that is the periodic shift in the perihelion (lowest point of an orbit) of Mercury.
3.) According to Newton's perspective, the force of gravity acting between two bodies is directly proportional to the product of their masses and inversely proportional to the distance between them squared. So according to his theory, since light particles - photons are massless, they would not be affected by a gravitational field. But General Relativity proved that the path of a light ray is influenced by a Gravitational Field, this phenomenon is known as - Gravitational Lensing.
4.) All the Newton's theories are based on absolute space and time, whereas General Theory of Relativity is based on relative space and time.
Due to these reasons, General Relativity is considered more general than Newtonian theory.