How many of the seven uses of lasers are you using correctly?

p>The word Laser (commonly known as "Laser") means light waves produced or amplified by stimulated radiation. high powered laser is an intense, highly condensed, unidirectional and monochromatic light beam, both visible and invisible to the naked eye. The word laser means light waves produced or amplified by stimulated radiation. Laser is an intense, highly condensed, unidirectional and monochromatic light beam, both visible and invisible to the naked eye. First of all, let's review what we've learned about physics. At the microscopic level, electrons orbit the nucleus erratically, but at different energy levels the distance between the two is different. When an electron falls from a higher energy state to a lower energy state, according to the law of conservation of energy, this energy is released both as light and as heat, which is the nature of light. And light has wave-particle duality, different wavelengths of light show different characteristics, in line with a certain wavelength of light and performance, is the laser.

Safety standards for lasers

Level 1 standards do not require any safety rules. Second standard, absolutely prohibit anyone to look at the laser light source for a long time. It is strictly prohibited to point the laser at human eyes unless it is for beneficial purposes and the intensity and duration of the irradiation do not exceed the permitted upper limit. Operate the laser only in a limited area, for example, in a closed room with no Windows. Post prevention warning signs on doors. Operate the laser only in a limited area, for example, in a closed room with no Windows. Post prevention warning signs on doors. Operate the laser only in a limited area, for example, in a closed room with no Windows. Post prevention warning signs on doors.

The laser pen. Also known as laser designator, pointing pen, etc., is the visible laser designed to be portable, easy to hold, laser module processing into the pen emitter. Common laser Pointers are red, green, blue, blue and violet, and the power is usually in milliwatts. Laser treatment: can be used for surgical operation, relieve pain, reduce infection. The application of laser in medicine is mainly divided into three categories: laser life science research, laser diagnosis and laser treatment, among which laser treatment is divided into: laser surgical treatment, non-surgical treatment of weak laser biological stimulation and laser photodynamic therapy. Laser welding. Laser welding: auto body thickness plate, auto parts, lithium battery, pacemaker, sealing relay and other sealing devices and all kinds of devices that do not allow welding pollution and deformation. The lasers used in 2013 include YAG laser, CO2 laser and semiconductor pumped laser.