1.Previous
3.Next

and gravitational mass is a consequence of their fundamental identity. The equivalence principle can be considered an extension of the principle of relativity, the principle that the laws of physics are invariant under uniform motion.

An observer in a windowless room cannot distinguish between being in a uniform gravitational field of 1g and being in a spaceship in deep space accelerating at 1g. Observations of physical phenomena in these cases will be indistinguishable.

In Newton's

1.Previous
3.Next