What type of electromagnetic radiation do CT scanners use? Which electromagnetic radiation is used for eye surgery? Are lasers ionizing radiation? How old is laser measuring technology? What rapid prototyping technologies do not require a laser?
Laser is an acronym for “Light Amplification by Stimulated Emission of Radiation” which describes the physics involved with generating laser light. While the fundamental physics of lasers remains unchanged, there are three common implementations of this technology: CO2, Fiber, and Nd:YAG lasers. Th...
Previously, the lifespan of excimer lasers was limited due to (1) corrosion from used gases, (2) erosion of electrode materials, (3) degradation of optical materials caused by strong ultraviolet radiation, and (4) chemical byproducts and dust pollution generated by discharge. The above problem ...
Optical radiation is the spectrum of electromagnetic radiation that ranges in wavelengths of 100 nanometers to one millimeter...
What type of radiation travels at the speed of light? What is a common light source for a visible spectrophotometer? What devices emit electromagnetic radiation? What does ionizing radiation do to electronics? Which metals exhibit the photoelectric effect? What is the wavelength of yellow light? Wh...
IR radiation is stimulated by thermal agitation when radiation strikes an object. This type of radiation moves in a straight line as light, not as thermal convection or electrical conduction. An infrared laser diode intensifies this non-visible light to deliver rapid digital transmissions in everythi...
When the photons generated by spontaneous radiation pass through the semiconductor, once they have passed the vicinity of the emitted electron-hole pair, they can be excited to recombine and generate new photons. This photon induces the excited carriers to recombine and emit new photons, which is...
"The invention of the laser, which stands for light amplification by stimulated emission of radiation, can be dated to 1958 with the publication of the scientific paper, Infrared and Optical Masers, by Arthur L. Schawlow, then a Bell Labs researcher, and Charles H. Townes, a consultant to ...
Infrared radiation (IR), or infrared light, is a type of radiant energy that's invisible to human eyes but that we can feel as heat. All objects in the universe emit some level of IR radiation, but two of the most obvious sources are the sun and fire. ...
In addition, laser radiation can damage the eyes. Fumes rising from the surface of the burnt material can also be dangerous. As such, most engravers have various safety features such as a laser beam enclosure to prevent contact – and a cover to protect your eyes from harsh UV rays. It’...