This is a legitimate high-power laser instrument. It will cast a dot on the clouds and burn a hole through a plastic cup from across the room. It is guaranteed to be above 50mW in output power, but that is a very conservative power rating. In actuality, these lasers usually have an output between 100mW and 150mW, or even more.
Skyline57GTR wrote:yes, it is real. But that's not enough thick the laser light, I mean its very thin laser light.
Hawkwing74 wrote:Is that real? Action Jim, please comment.
Arkwald wrote:a mere kW? How do you get a MW laser
In initial tests with the Teramobile firing 250 mJ pulses centered at 800 nm, the R-FIBS system successfully detected copper and steel samples located 90 m away. The laser's repetition rate was 10 Hz with a minimum pulse duration emitted of 80 femtoseconds. The researchers say a beam profile containing around 30 filaments was typically incident on the sample giving an intensity of around 10^13 W/cm2.
Captain Ned wrote:Assume the hole in the cup is 1mm. Assume that a light sabre blade is 50mm (2 inches +/-) in diameter. Applying basic math tells me that the light sabre's flux per square millimeter is 1/62500 of the original laser. Yawn.
just brew it! wrote:It's probably even worse than that. The original beam is probably smaller than the hole in the cup because A) the laser was hand-held, and so probably moved around a bit during the demonstration; and B) the plastic probably melted back a bit from where the laser actually hit it.
AMM wrote:JavaDog wrote:AMM wrote:Though lasers are not visible unless there is some kind of dust suspended in the atmosphere.
Not quite true.
Well okay, air molecules can scatter some photons... I was thinking of a laser in a vacuum.