Taking the beam divergence to be 0.0003 radians ( as Red Act explains above, this is the ideal beam divergence that can be obtained by a laserpointer with a 2 mm initial beam diameter ), the flux of a 5 milli-Watt laserpointer a distance d away is:
22.
Taking the beam divergence to be 0.0003 radians ( as Red Act explains above, this is the ideal beam divergence that can be obtained by a laserpointer with a 2 mm initial beam diameter ), the flux of a 5 milli-Watt laserpointer a distance d away is:
23.
A 6-watt green ( 532 nm ) laser with a 1.1 milliradian beam divergence is an eye hazard to about, can cause flash blindness to about 8, 200 feet ( 1.5 mi / 2.5 km ), causes veiling glare to about 36, 800 feet ( ), and is a distraction to about 368, 000 feet ( ).
