The thickness of a human hair is about 80,000 nanometers.
Толщина человеческого волоса составляет около 80,000 нанометров.
Definitions
A unit of length in the metric system, equal to one billionth of a meter (10^-9 meter), commonly used to measure wavelengths of light and dimensions at the atomic scale.
The wavelength of ultraviolet light is typically around 300 nanometers.