3 ms·
ObPeeve: In general, you don't focus lasers. The narrow beam is a result of it being collimated as it's produced. http://en.wikipedia.org/wiki/Laser#Laser_phys
by jbert 18y ago
ObPeeve: In general, you don't focus lasers. The narrow beam is a result of it being collimated as it's produced.
http://en.wikipedia.org/wiki/Laser#Laser_physics http://en.wikipedia.org/wiki/Laser#Laser_physics