Question: why are u building lasers there other stuff that help to find out about scince

Marcus Gallagher-Jones answered on 16 Mar 2012:

I’m not building lasers. The laser itself was built by other people. I’m simply building things with which to perform experiments using the light produced by the laser. There are various technical chalenges involved because the beam is very small, a thousandth of a millimetre, and the whole system needs to be connected to high vacuum.