The straight line distance between two points.
- The SI unit of Length
- The SI unit of length is the metre and is equal to 1650763.73 wavelengths in vacuum of the radiation corresponding to the transition 2p10-5ds of a krypton 86 atom.
1 foot = 0.3048 m 1 fathom = 1.8288 m 1 mile = 1609 m 1 nautical mile = 1852 m 1 cable = 219.456 m 1 inch = 0.0254 m
Classical electron radius 2.817940285x10-15m Wavelength of red visible light 7x10-7m Equatorial radius of the Earth 6.37814x106m Orbital semi-major axis about the sun 1.495979x1011m