4 ms·

By "frame of reference", I know you meant "inertial frame of reference", but of course the Earth moving around the sun and the solar system moving in the galaxy

by ced 15y ago

By "frame of reference", I know you meant "inertial frame of reference", but of course the Earth moving around the sun and the solar system moving in the galaxy are not inertial. My weight is a bit stronger during the day than during the night because of the centrifugal force, isn't it? I'm sure that the effects are tiny for the LHC, but are they accounted for at all?

lisper 15y ago
> you meant "inertial frame of reference" Actually no. The speed of light is constant in ALL frames of reference, whether inertial or not. The math just gets more complicated in non-inertial frames. (That's the difference between special and general relativity.) UPDATE: it's actually a little more complicated than that. See http://en.wikipedia.org/wiki/Propagation_of_light_in_non-inertial_reference_frames http://en.wikipedia.org/wiki/Propagation_of_light_in_non-ine... > I'm sure that the effects are tiny for the LHC Actually, gravity is a pretty significant factor. See e.g.: http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps....