[Attention Surplus Disorder]

a “YAG” laser is one whose frequency and other characteristics is governed by its use of Yttrium Aluminum Garnet; a synthetic gemstone grown in and crystallized out of high-temp furnaces.

My Dad used to have a synthetic gemstone business and peddled chunks of YAG for home-brew gemstone faceters to cut up.

[yarddog]

Thanks, that is interesting.

I simply had to stare at a dot for maybe 30 seconds and I kept seeing and hearing red dot flashes. No pain at all.