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 furlong equals 201.168 meters or 1/8 of a statute mile. It originated as the length of a medieval English plough furrow โ "furrow long". Today it survives mainly in horse racing in the UK, Ireland and North America, where race distances are typically 5 to 12 furlongs.
Real-world: The Epsom Derby is run over 1 mile and 4 furlongs (about 2.4 km). The Kentucky Derby is 10 furlongs.
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