I randomly pointed the laser at one of those orange plastic pumpkin things
I randomly pointed the laser at one of those orange plastic pumpkin things and it didn't look green.Most often, I discourage people from using laser pointers to play with cats. There are so many other exciting toys to use. Nevertheless, there are situations when high power laser pointer are the only way cats can be played with. It is either laser play or no play.Just a note: I first noticed this when I was playing with my green laser pointer during Halloween.
Once the fog starts rolling, shine the laser pointer at a spot through the fog. Notice how the fog continues to move, but the laser beam remains in a straight line.They occur all the time, but only with green laser pointer we see them because laser radiation is coherent - all the waves have nearly the same wavelenghth, are collimated (parallel in direction) and are in near perfect phase as they exit the laser generator.Such a powerful laser, if properly focused, would be formidable defensive weapon.
And yet a new study shows a majority of the dinky laser pointers on the market exceed the power level limits set by the Code of Federal Regulations.In group presentations, burning laser pointer are commonly used by professors or managers to highlight important words or objects that appear on a board or projection screen. As opposed to a long stick pointer or yard stick, a laser draws the audience's eyes to whatever it is highlighting. The red laser is the most effective color for keeping people's attention during lectures and group presentations.
One of our local physics teachers demo'd this at our Fall Demo Night a few years ago. I bought a green laser pointer just for that! One of my colleagues has bought a BLUE laser pointer.now I have laser envy.Ohira then put the telescope/laser device on the side of the Tama Hills in Kawasaki. He planned to aim the laser at the 52ndfloor observation tower at Roppongi Hills in the center of Tokyo. At 20 km (12.4 miles) away, the laser's power would be tested to see if it could survive the "commute" across town.
Angela Stark said the agency has met with Chinese government officials several times "to better communicate regulations and risks of injury to laser products to China laser product manufacturers."The U.S. Food and Drug Administration has limited the wattage of 1000mw Laser Pointer sold in the U.S. to no more than 5 milliwatts and required warnings about radiation and other hazards.FDA spokeswoman
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ارسال شده در تاریخ چهار شنبه 28 مهر 1395
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