:::::::: Special relativity says that the speed of light is constant. Maxwell's theory says that same thing, as does the Michelson-Morley experiment. It can be said to be an assumption or a prediction, depending on what textbook you are reading. At any rate, it is testable, and has been confirmed in many ways (for light in a vacuum). It was tested in outer space before testing on Earth. Relativity certainly also makes predictions about charged particles traveling less then the speed of light. The biggest prediction is the formula known as the Lorentz force law. This was an important part of relativity as decribed by Lorentz, Poincare, and Einstein. The Lorentz force law used to be considered part of Maxwell's equations. [[User:RSchlafly|RSchlafly]] 15:49, 22 August 2011 (EDT) | :::::::: Special relativity says that the speed of light is constant. Maxwell's theory says that same thing, as does the Michelson-Morley experiment. It can be said to be an assumption or a prediction, depending on what textbook you are reading. At any rate, it is testable, and has been confirmed in many ways (for light in a vacuum). It was tested in outer space before testing on Earth. Relativity certainly also makes predictions about charged particles traveling less then the speed of light. The biggest prediction is the formula known as the Lorentz force law. This was an important part of relativity as decribed by Lorentz, Poincare, and Einstein. The Lorentz force law used to be considered part of Maxwell's equations. [[User:RSchlafly|RSchlafly]] 15:49, 22 August 2011 (EDT) |