Expensive Laser Pointer how to guarantee quality?
Our laser Pointers produce beams of low enough power that they pose minimal risk to the eye in random situations. The Green Laser Pen Shop also offers green Laser safety glasses to avoid the risk of damaging our lasers. The woman introduced an 80-yuan laser pointer, whose beam has a range of at least 2,000 meters. The woman held up a laser pointer, aiming the beam at the sky, and I saw the green light straight up into the sky, with no end in sight. When the beam hits an obstacle, it concentrates in a very bright place. Unlike lenses, laser Pointers will be able to emit speckled "starlight". Looking at these bright spots, the reporter felt dizzy.
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The laser wavelength and the energy of the electrons in the free electron laser output are the same: change the acceleration voltage of the electron beam, so that the laser wavelength changes, which is called the tuning voltage, the tuning range is very wide, can be done in principle at each wavelength can be operated. Nowadays, 10000MW laser pen is more and more popular among students, but some students also use green laser pointer back and forth with their eyes. Experts advise that it is easy to cause eye damage and even permanent blindness when directed at the eyes with a laser pointer.
2021-12-10 10:53:33
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