MadSci Network: Physics |
Lloyd - You have answered your own question! The same way Einstein did, I might add. You said: > To say something is moving, it is neccessary to relate it to > something else. Einstein said: "Everything is relative." Presuming that these two statements are equivalent and true, then, by definition, it is not possible to define an ABSOLUTELY stationary object or point of the universe. The speed of light is measured relative to other things, like, for example, a laser that produces the light. The precision of the measurement is exceedingly high, but alas, in the cosmic scope of things, will never be absolutely absolute. Perhaps now is a good time to introduce you to a concept of precision level we scientific types like to technically refer to as "good enough". :)