Jun
Laser Pointer
Posted in Construction Equipment | No Comments »Laser Pointer
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 New Ultra Powerful Laser Pen Pointer Beam LED Light Red  US $.01
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 ULTRA POWERFUL GREEN BEAM LASER POINTER PEN 5 mW 532nm US $.99
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 New Stylish 5mW 5 mW 532nm Green Beam Laser Pointer Pen US $.99
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 Free Ship 5mW Red Laser Pointer Beam Light U29 US $2.25
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 Ultra Powerful Red Laser Pointer Pen Beam Light 5mW o8 US $3.44
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 Newest 5mW 532nm Green Beam Laser Pointer Pen Beam US $.77
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Keep two eyes for the green laser scam and choose a high quality laser pointer pen
Most laser lovers know well that there was, for years, no such thing as a really powerful laser pointer, and all that could be found are laser Pointers varied in real output power between around one milliwatt (mW) and 5mW.Nobody had ever expected to see a handheld laser pointer as high as 600mw in power until such a burning laser is at the palm of his hand.
Ebay used to be the rendezvous of most lower-powered laser lovers or researchers in the first place, because people have been fed with a mere flashlight-like laser pointer.
They want an illuminant burner. They wanna cut, burn, pop and light things. So even the $30 green lasers at Ebay look far, far brighter than red laser, they tend to lose the attraction to most newbies. Echoing the "necessity takes market" rule, the high powered laser pointers soon becomes more than common at ebay. Then laser lovers enjoy playing laser craze there. Another sad fact is that many pros in laser technology came to realize that like any other high-tech gadget in any market place, eBay has its share of both good and bad sellers, offering bargains and scams.One scam carried out by a small number of eBay sellers that is becoming increasingly common is high powered green laser pointers.
Actually, the scam itself is based on the type of light given out by the laser pointer, the way power is measured, changes made to the laser pointer and ignorant and/or dishonest sellers. So it seems silly enough to sacrifice the quality for the price. cheap high quality powerful laser pointer and wireless laser pointers for presentation are really great, in themselves; the visible beam at night (even if you're indoors with the lights on) will be beyond your wildest imagination and there are lots of cool things you can do with them.
I am obsessed with the green laser pointer at the widest range of off 25% 1-700mW green laser pointers , but hate the green laser scam always.
About the Author
Being cutting-edge pays sometimes. I never reget buying the 200mw green laser pointer from powerful green laser pointer and the affordable induction heating system from induction heating system
How far could the ray from my laser pointer travel?
At some clear and starry nites, I often point out the stars with my laser pointer. I wondered, how far does the ray travel? Does it ever reach the distance stars out there?
In the vacuum of space the light from your laser-pointer would, theoretically, travel forever -- except that outward pressure from the photons, from which the the light is composed, eventually disperse the laser's coherent-light beam.
Here on Earth, the energy in the beam is sapped, little by little, from collisions with the gas molecules in the air, as well as the dust particles and tiny water droplets suspended in it (remember that air is not invisible; it is merely transparent, and miles and miles of it add up, the same way that thin glass panes that seem to clear individually form a dark green opaque mass when stacked twenty thick), with all the energy scattered and absorbed.
Still, though your laser-pointer will not illuminate significantly beyond a range of 200-300 feet, its light is still intense enough to trigger the receptors in the retinas of observers a mile or two away. To them it will appear as just a tiny point of light.
PS: In the early 1960s NASA bounced a very powerful laser beam off the surface of the Moon, 238,000 miles away. The beam started out at the source less than a half-inch wide; by the time it struck the moon it was nearly a mile wide (and very faint) as a result of the pressure from the energetic photons (and some inevitable dispersal due to its passing through the Earth's atmosphere on the way to the Moon).
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