Stone and GPS (satellite navigation): what they have in common

1. Step 1. Stone — is material for — Interferometer. Michelson’s instrument stood on a stone slab.
2. Step 2. Interferometer — inspired — Theory of relativity. The Michelson–Morley experiment found no ether.
3. Step 3. Theory of relativity — is used in — GPS (satellite navigation). Corrections for the relativistic slowing of clocks.

Open Evothings