Search results
Results from the WOW.Com Content Network
A laser only emits light of high irradiance at a very narrow wavelength interval, typically under 0.01 nm, which makes an excitation monochromator or filter unnecessary. The disadvantage of this method is that the wavelength of a laser cannot be changed by much. A mercury vapor lamp is a line lamp, meaning it emits light near peak wavelengths.
In addition to news and feature articles, Photonics Spectra contains business reports, technology updates, reader forums, new products and literature, calendars of conferences and courses, and applications reports. Photonics Spectra has been published since 1967 by Laurin Publishing Company, Inc. in Pittsfield, MA, United States.
Gemologists frequently use spectroscopes to determine the absorption spectra of gemstones, thereby allowing them to make inferences about what kind of gem they are examining. [9] A gemologist may compare the absorption spectrum they observe with a catalogue of spectra for various gems to help narrow down the exact identity of the gem.
Emission spectrum of an ultraviolet deuterium arc lamp showing characteristic hydrogen Balmer lines (sharp peaks at 486 nm and 656 nm labeled D β and D α from left to right respectively), continuum emission in the ~160-400 nm region and Fulcher band emission between around 560 to 640 nm.
In the use of non-linear crystals as a source, a high-intensity ultrashort pulse produces THz radiation from the crystal. A single terahertz pulse can contain frequency components covering much of the terahertz range, often from 0.05 to 4 THz, though the use of an air plasma can yield frequency components up to 40 THz. [1]
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).
Updated December 3, 2024 at 12:53 PM. 1 / 5. Inter Miami Coach. FILE - Argentina's head coach Javier Mascherano reacts before the quarter final soccer match between France and Argentina, at ...
For example, a laser pulse making 500 round trips through a 1-meter cavity will effectively have traveled through 1 kilometer of sample. Thus, the advantages include: High sensitivity due to the multipass nature (i.e. long pathlength) of the detection cell. Immunity to shot variations in laser intensity due to the measurement of a rate constant.