Crystals and Lasers by Professor J. M. Thomas ,
FRS and Professor D. Phillips , PHD, FRSC, the Director and Assistant Director of the Royal Institution.
A series of six lectures 1: The Micro-world
A visit to the extraordinary micro-world of crystals and lasers where atoms are only l/10,000th of a millionth of a metre apart, and laser light pulses only l/100th of one millionth of one millionth of a second.