How small is 1 nanometer? 100 slices Human Hair 100m Take 1 slice Take 1 slice X1898888516 NUSPn Human Hair 1nm 1000 slices 1μm 一纳米有多小？How small is 1 nanometer? 100 m 100 slices Take 1 slice 1000 slices 1µ m Take 1 slice 1nm Human Hair Human Hair 一纳米有多小？