To help compare different orders of magnitude this page lists lengths between 10-7 and 10-6 m (100 nm and 1 µm).Distances shorter than 100 nm100 nm — greatest particle size that can fit through a surgical mask120 nm — greatest particle size that can fit through a ULPA filter125 nm — standard depth of pits on compact discs (width: 500 nm, length: 850 nm to 3.5 µm)180 nm — typical length of the rabies virus200 nm — typical size of a Mycoplasma bacterium, among the smallest bacteria280 nm — near ultraviolet wavelength300 nm — greatest particle size that can fit through a HEPA filter380-420 nm — wavelength of violet light (see color and optical spectrum)420-440 nm — wavelength of indigo light440-500 nm — wavelength of blue light500-520 nm — wavelength of cyan light520-565 nm — wavelength of green light565-590 nm — wavelength of yellow light590-625 nm — wavelength of orange light625-740 nm — wavelength of red light Distances longer than 1 µm See more at Wikipedia.org...