What a fabulous video! I want to be reborn, work harder at school and go to Cranfield University!

Half a um is the wavelength of blue light. Just measuring to that accuracy is serious science in it's own right and then he says they can make parts accurate to a few nm! One of my colleagues from a past life ('Dr Dave') had got his PhD by 'photographing' the individual atoms in crystal layers without an electron microscope. In effect he was measuring the varying distance between a microscopic metal probe and the surface of the atoms (if an atom can be said to have a surface) as the probe was moved over the crystal . He gave us a talk on how it was done. Nearly 30 years later I still remember sitting there utterly gobsmacked.