Actually Einstein postulated that nothing can travel at the speed of light. He theorized that as something approaches the speed of light its mass increases. This means that for something to travel at the speed of light it needs to have an infinite source of energy. The only things that can travel at the speed of light are particles that have no mass, otherwise known as photons.
energy and matter
Galileo Galile wrote "the Theory of Relativity", and Einstein wrote the General theory of relativity and the special theory of relativity.
Just a "theory" ... actually only a hypothesis at present.
Einstein's theory of relativity encompasses two theories: special relativity and general relativity. The theory of relativity is simply referred to as relativity in the field of physics.
A Theory of Relativity was created in 2001.
that matter can be turned into energy and vice versa
Matter and energy are always converted due to the theory of relativity.
Albert Einstein is one of the most prolific scientific minds in history. When he made his Theory of Relativity he did have a few thoughts on the subject. He thought it was one of the principle theories. This means it is not based on a hypothesis, but facts.
The Theory of Relativity was developed by Albert Einstein.
Albert Einstein discovered the theory of relativity
The Theory of Special Relativity was published in 1905. General Relativity was published in 1915.
Yes, he developed the theory of relativity