The nanometer equals one billionth of a meter. Visible light spans 380โ700 nm. Modern semiconductors are manufactured on 3โ5 nm process nodes. Gold atom diameter is 0.29 nm. The nanometre is the natural scale for atomic physics and nano-engineering.
Real-world: Visible light is 380โ700 nm. Apple's A17 Pro chip uses a 3 nm process. The DNA double helix is 2 nm wide.
Read full nanometer reference โThe yard equals 0.9144 meters exactly, or 3 feet. It is the standard field unit in American football (100-yard field) and British cricket (22-yard pitch). Fabric and textile in Anglo-Saxon countries is still sold by the yard. Historically the yard was said to be the length of King Henry I of England's arm.
Real-world: An NFL football field is 100 yards = 91.44 metres. A cricket pitch is 22 yards = 20.12 metres.
Read full yard reference โ