Metre
The metre is the SI unit of length and is equal to 1650763.73 wavelengths in vacuum of the radiation corresponding to the transition 2p10-5ds of a krypton 86 atom.
| 1 kilometre | = | 1000 metres | 1 m | = | 100cm |
| Classical radius of an electron | 2.818x10-15 m |
| Diameter of carbon atom | 3.0x10-10 m |
| Diameter of amoeba | 1.0x10-4 m |
| Height of man | 2 m |
| Height of large tree | 30 m |
| Height of Mt. Everest | 8.848x103 m |
| Radius of the Sun | 6.96x108 m |
| Mean Sun Earth distance | 1.496x1011 m |
| Distance to Crab Nebula (N.G.C. 1952) | 6.0x1019 m |
See also: decametre, decimetre, Femtometre, kilometre, Length, Micrometre, Mile.
Subjects: Units