To gain access to revision questions, please sign up and log in.
Photons are emitted when excited electrons lose energy in the form of electromagnetic radiation. In most light sources, photons are produced randomly with many different wavelengths. To produce LASER light, the photons must all ...
This is achieved by generating photons between two almost perfect mirrors that trap nearly all the light energy bouncing back and forth between the mirrors. This sets up a standing wave and new photons are produced in phase with this. A small proportion of the light is allowed to escape in a narrow beam.
reviseOmatic V3 Contacts, ©, Cookies, Data Protection and Disclaimers Hosted at linode.com, London