What is the function of photometer in spectrophotometer?
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What is the function of photometer in spectrophotometer?
A spectrophotometer, in general, consists of two devices; a spectrometer and a photometer. A spectrometer is a device that produces, typically disperses and measures light. A photometer indicates the photoelectric detector that measures the intensity of light.
What are the basic components of photometer?
Photometers have four basic components:
- the input unit.
- the monochromator.
- the detector.
- the control system.
What is principle of UV spectrophotometer?
The Principle of UV-Visible Spectroscopy is based on the absorption of ultraviolet light or visible light by chemical compounds, which results in the production of distinct spectra. Spectroscopy is based on the interaction between light and matter.
What does a UV spectrophotometer measure?
Ultraviolet-visible (UV-Vis) spectrophotometers use a light source to illuminate a sample with light across the UV to the visible wavelength range (typically 190 to 900 nm). The instruments then measure the light absorbed, transmitted, or reflected by the sample at each wavelength.
What is a photometer in physics?
A photometer is a device that measures the strength of electromagnetic radiation in the range of infrared radiation to ultraviolet radiation, including the visible part of the electromagnetic spectrum. Usually, a photometer converts light into electric current by using a photoresistor, photomultiplier, and photodiode.
What is the function of UV?
UV radiation is widely used in industrial processes and in medical and dental practices for a variety of purposes, such as killing bacteria, creating fluorescent effects, curing inks and resins, phototherapy and suntanning. Different UV wavelengths and intensities are used for different purposes.
What is the instrumentation of UV spectrophotometer?
Instrumentation of a UV Vis Spectrophotometer. The principle of measurement for UV Visible Spectroscopy or UV Vis spectrophotometer is relatively straightforward and consists of a light source, a wavelength dispersive element, sample, and detector.
What is UV principle?
What is the range of UV?
The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm).
Why is spectrophotometer also known as photometer?
Explanation: spectrophotometer uses photometers known as photometers that can measure light beams intensity as a function of its colour (wavelength).
Who discovered photometry?
Several years later, in 1916, the American astronomer Harlan True Stetson invented the first photometer that operated on this principle and most modern photometers work in the same way. Many improvements have been made to photographic photometers during the 20th century.
