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Red (635 nm), blueish violet (445 nm), and green (520 nm) laser pointers. A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.
Powerful laser is 'brightest light in the universe'—The world's most powerful laser as of 2008 might create supernova-like shock waves and possibly even antimatter "Laser Fundamentals" an online course by F. Balembois and S. Forget. Northrop Grumman's Press Release on the Firestrike 15 kW tactical laser product
Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material (see the figure description for details).
Printable Christmas cards. Sending Christmas cards can be a fun Christmas activity, but it can also feel like a chore to pick the perfect card, decide what to write in a Christmas card, and make ...
Example of petawatt laser. The Station of Extreme Light (SEL, 极端光物理线站) is laser facility aimed at producing a laser with 100 petawatts (PW) of peak power. The station is currently under construction in Shanghai, China. [1] The laser may be powerful enough to produce matter and antimatter directly from a vacuum [2] (the Schwinger ...
Laser light is useful in entertainment because the coherent nature of laser light allows a narrow beam to be produced, which allows the use of optical scanning to draw patterns or images on walls, ceilings or other surfaces including theatrical smoke and fog without refocusing for the differences in distance, as is common with video projection ...
Another military use of lasers is as a laser target designator. This is a low-power laser pointer used to indicate a target for a precision-guided munition, typically launched from an aircraft. The guided munition adjusts its flight-path to home in to the laser light reflected by the target, enabling a great precision in aiming.
Other optical devices, such as spinning mirrors, modulators, filters, and absorbers, may be placed within the optical resonator to produce a variety of effects on the laser output, such as altering the wavelength of operation or the production of pulses of laser light. Some lasers do not use an optical cavity, but instead rely on very high ...
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