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A colorimeter is a device used to test the concentration of a solution by measuring its absorbance of a specific wavelength of light. To use this device, different solutions must be made, and a control (usually a mixture of distilled water and another solution) is first filled into a cuvette and placed inside a colorimeter to calibrate the machine.
A colorimeter or a digital camera with a color filter array can, under certain conditions, be used as an alternative to a spectrophotometer. [7] [8] The illuminant and observer conditions should be specified when citing a measurement (e.g. D65/10°). [9] The quality of a colorimeter may be assessed using the means in CIE publication 179:2007. [10]
Colorimetry is "the science and technology used to quantify and describe physically the human color perception". [1] It is similar to spectrophotometry, but is distinguished by its interest in reducing spectra to the physical correlates of color perception, most often the CIE 1931 XYZ color space tristimulus values and related quantities.
A colorimeter is a device used in colorimetry that measures the absorbance of particular wavelengths of light by a specific solution. [1] [2] It is commonly used to determine the concentration of a known solute in a given solution by the application of the Beer–Lambert law, which states that the concentration of a solute is proportional to the absorbance.
Color calibration of a monitor using ColorHug2, an open source colorimeter, placed on the screen. For calibrating the monitor a colorimeter is attached flat to the display's surface, shielded from all ambient light. The calibration software sends a series of color signals to the display and compares the values that were actually sent against ...
For articles on Colorimeter see: Colorimeter (chemistry) Tristimulus colorimeter; See also. Colorimetry; Colorimetry (chemical method) Calorimeter
The distance to the star can then be calculated from its apparent magnitude using the distance modulus. There are major limitations to this method for finding stellar distances. The calibration of the spectral line strengths has limited accuracy and it requires a correction for interstellar extinction. Though in theory this method has the ...
To measure the index, one observes the magnitude of an object successively through two different filters, such as U and B, or B and V, where U is sensitive to ultraviolet rays, B is sensitive to blue light, and V is sensitive to visible (green-yellow) light (see also: UBV system). The set of passbands or filters is called a photometric system ...
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