Difference between revisions of "Spectrometers"
(Created page with "Category:Meters, Gauges{{Knoppen}} <noinclude><!------------------------------------------------ * READ THIS FIRST * Only edit this page if you can improve the content. ...") |
|||
| Line 7: | Line 7: | ||
* Please start editing this page after the /noinclude | * Please start editing this page after the /noinclude | ||
* -------------------------------------------------></noinclude> | * -------------------------------------------------></noinclude> | ||
[[File:Spectrometer earliest.JPG|thumb|right|Earliest Spectrometers]] | |||
[[File:Spectrometers.JPG|thumb|right|Spectrometers]] | |||
'''Spectrometer''' 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.The variable measured is most often the light's intensity but could also, for instance, be the polarization state. The independent variable is usually the wavelength of the light or a unit directly proportional to the photon energy, such as wave number or electron volts, which has a reciprocal relationship to wavelength. A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared. If the instrument is designed to measure the spectrum in absolute units rather than relative units, then it is typically called a spectrophotometer. The majority of [[Spectrophotometers]] are used in spectral regions near the visible spectrum. | |||
In general, any particular instrument will operate over a small portion of this total range because of the different techniques used to measure different portions of the spectrum. Below optical frequencies that is, at microwave and radio frequencies, the spectrum analyzeris a closely related electronic device. | |||
Latest revision as of 08:43, 26 December 2012
Spectrometer 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.The variable measured is most often the light's intensity but could also, for instance, be the polarization state. The independent variable is usually the wavelength of the light or a unit directly proportional to the photon energy, such as wave number or electron volts, which has a reciprocal relationship to wavelength. A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared. If the instrument is designed to measure the spectrum in absolute units rather than relative units, then it is typically called a spectrophotometer. The majority of Spectrophotometers are used in spectral regions near the visible spectrum.
In general, any particular instrument will operate over a small portion of this total range because of the different techniques used to measure different portions of the spectrum. Below optical frequencies that is, at microwave and radio frequencies, the spectrum analyzeris a closely related electronic device.