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X-ray photoelectron spectroscopy ( XPS) is a surface-sensitive quantitative spectroscopic technique based on the photoelectric effect that can identify the elements that exist within a material (elemental composition) or are covering its surface, as well as their chemical state, and the overall electronic structure and density of the electronic ...
The Doppler effect (also Doppler shift) is the change in the frequency of a wave in relation to an observer who is moving relative to the source of the wave. [1] [2] [3] The Doppler effect is named after the physicist Christian Doppler, who described the phenomenon in 1842. A common example of Doppler shift is the change of pitch heard when a ...
Spectrum is the trade name of Charter Communications, which is widely used by market consumers and commercial cable television channels, internet, telephone, and wireless service providers. The brand was first introduced in 2014; prior to that, these services were marketed primarily under the Charter brand. Following the acquisitions of Time ...
The wavelength of light is then selected by the slit on the upper right corner. An optical spectrometer ( spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. [1]
Shock (mechanics) Explosive shock test of naval ship. In mechanics and physics, shock is a sudden acceleration caused, for example, by impact, drop, kick, earthquake, or explosion. Shock is a transient physical excitation. Shock describes matter subject to extreme rates of force with respect to time. Shock is a vector that has units of an ...
Wireless network technologies. In telecommunications, 5G is the fifth-generation technology standard for cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the successor to 4G technology that provides connectivity to most current mobile phones. Like its predecessors, 5G networks are cellular networks, in ...
Screenshot of DSLReports as of December 22, 2015. DSLReports is a North American-oriented broadband information and review site based in New York City. [6] The site's main focus is on internet, phone, cable TV, fiber optics, and wireless services in the United States and Canada, as well as other countries (United Kingdom and Australia).
One peak is from the L shell of iron. Energy-dispersive X-ray spectroscopy ( EDS, EDX, EDXS or XEDS ), sometimes called energy dispersive X-ray analysis ( EDXA or EDAX) or energy dispersive X-ray microanalysis ( EDXMA ), is an analytical technique used for the elemental analysis or chemical characterization of a sample.
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