Oh, I'm supposed to look at every thread on the site on the off chance that your post is a reference to something else? Ain't nobody got time fuh dat.
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2 1/2 years for pointing laser at cop???
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Originally posted by JP135 View PostOh, I'm supposed to look at every thread on the site on the off chance that your post is a reference to something else? Ain't nobody got time fuh dat.Originally posted by davbrucasI want to like Slow99 since people I know say he's a good guy, but just about everything he posts is condescending and passive aggressive.
Most people I talk to have nothing but good things to say about you, but you sure come across as a condescending prick. Do you have an inferiority complex you've attempted to overcome through overachievement? Or were you fondled as a child?
You and slow99 should date. You both have passive aggressiveness down pat.
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Originally posted by JP135 View PostOh, I'm supposed to look at every thread on the site on the off chance that your post is a reference to something else? Ain't nobody got time fuh dat.Originally posted by racrguyWhat's your beef with NPR, because their listeners are typically more informed than others?Originally posted by racrguyVoting is a constitutional right, overthrowing the government isn't.
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Originally posted by Special K View PostIt's stupid thing to do... What makes it sad is you have this kid going to prison and say that waste of space "retired" Dallas Cowboy free for driving drunk and killing someone ...
the system truly is fucked!70' Chevelle RagTop
(Forever Under Construction)
"Opportunity is missed by most people because it is dressed in overalls and looks like work.”- Thomas A Edison
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Originally posted by QIK46 View Postbut that guy had money the guy with the laser was probably a broke ass. look at OJ everybody knows he killed both of them but he had money so he walked
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"Remember the helicopters illuminated by hundreds of lasers over Tahir Square during the Egyptian Revolution last month? I commented as a pilot about the dangers of being blinded. Some people didn’t understand why a pilot couldn’t keep flying, even if blind, so, I made a video."
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Originally posted by Shorty View Post
"Remember the helicopters illuminated by hundreds of lasers over Tahir Square during the Egyptian Revolution last month? I commented as a pilot about the dangers of being blinded. Some people didn’t understand why a pilot couldn’t keep flying, even if blind, so, I made a video."
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Originally posted by DOHCTR View PostI am not aware of any common military grade laser that puts out a visible light.
edit: not specific to "military grade" but visible beam lasers in general
We used them all the time on astronomy trips back in college. Very easy way to point out things in the sky because of the visible beam.
A Look at the Hazards of Green Laser Pointers
by David Dickinson on April 4, 2013
Those handheld green lasers pointers may not be as harmless as you thought.
A recent study released by researchers at the National Institute of Standards and Technology (NIST) has revealed an alarming trend. Of 122 hand-held laser pointers tested, 44% of red lasers and 90% of green lasers tested failed federal safety regulations.
The primary culprit was overpowered units. The Code of Federal Regulations in the United States limits commercial class IIIa lasers to 5 milliwatts (mW). And yes, lasers above 5 mW are commercially available in the United States, but it is illegal to market them as Class IIIa devices. Some units in the NIST study tested as high as 13 times over the legal limit at 66.5 mW. For context, many military grade rifle mounted lasers are rated at 50 mW.
“Our results raise numerous safety questions regarding laser pointers and their use,” stated NIST laser safety officer in the recent paper presented at the Laser Safety Conference in Orlando, Florida.
Why should backyard astronomers care? Well, since hand-held lasers first became commercially available they’ve become a familiar staple at many public star parties. Reflecting back off of the dust and suspended particles in the atmosphere, a green laser provides a pointer beam allowing the user to trace out constellations and faint objects. Lasers can also be mounted on the optical tube assemblies of a telescope for pointing in lieu of a finder scope.
An amateur astronomy club based near San Antonio, Texas even coordinated signaling the International Space Station with a pair of powerful searchlights and a 1 watt blue laser in 2012, just to prove that it was possible.
But such devices are not toys. Even a 5 mW laser can temporarily blind someone at short range. Further eye damage can often linger for days or even permanently and can go unnoticed. This is why researchers working around lasers in research facilities such as LIGO (the Laser Interferometer Gravitational Wave Observatory) must submit to routine eye exams.
The trouble with green lasers is that, well, they look too much like light sabers.
It’s for this reason I keep mine on a very “short leash” at star parties and NEVER hand it off to anyone, no matter how well meaning, child or adult. I also NEVER point it below the local horizon, (there’s wildlife in them trees). A laser reflected inadvertently off of an optical surface such as a car window or primary mirror can also do just as much damage as a direct aiming.
And also, NEVER aim one at an aircraft. In fact, it’s a federal violation to do so. The Federal Aviation Administration has reported a 13-fold trend in reported aircraft/laser incidents from 2005 to 2011. There has also been an upward trend in individuals being tracked down and prosecuted for such offenses. If it blinks, assume it’s an aircraft and steer clear!
In a post-9/11 era, the Department of Homeland Security has been concerned with the potential threat posed by laser pointers as well. It’s not yet illegal to fly in the US with a 5mW laser pointer in your carry-on luggage, but and several countries now outlaw them all together, a note for traveling astronomers. Note that the de facto policy often comes down to the particular TSA officer you’re dealing with.
With this sort of news, we wonder if laser pointers might become outlawed entirely in the coming years. 5mW range lasers are generally classed IIIa or 3R systems. By the American National Standards Institute (ANSI) guidelines, such devices under the recent NIST study would fall into the much more hazardous IIIb range for 5-500 mW lasers. Such lasers can cause permanent eye damage with direct exposure for periods of as little as 1/100th of a second.Those handheld green lasers pointers may not be as harmless as you thought. A recent study released by researchers at the National Institute of Standards and Technology (NIST) has revealed an alarming trend. Of 122 hand-held laser pointers tested, 44% of red lasers and 90% of green lasers tested failed federal safety regulations. The primary … Continue reading "A Look at the Hazards of Green Laser Pointers"Last edited by Strychnine; 07-26-2013, 07:21 AM.
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