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What is the wavelength of selenium?
The wavelength of selenium typically refers to the wavelength of light emitted by selenium when it is excited. Selenium emits light in the red part of the spectrum with a wavelength around 600-700 nanometers. This characteristic makes selenium useful in applications like photocopiers and photovoltaic cells.
What happens when selenium is exposed to light?
Selenium is photoconductive, meaning its electrical conductivity increases when exposed to light. This property is used in applications such as photocopiers and solar cells. However, prolonged exposure to bright light can degrade selenium's performance.
Why do photographers work with low light with selenium?
Photographers choose to work with low light in selenium toning because selenium toning has the ability to enhance the tonal range of black and white photographs, making subtle details in shadows more visible and increasing overall image contrast. This can help achieve a more dramatic and visually appealing final print.
What is a selenium Camera?
A selenium camera is a type of light metering system that uses a selenium cell to measure the amount of light available for a photograph. It is commonly found in older film cameras and works by converting light into an electrical current which helps to determine the optimal exposure settings for a photo.
Why selenium is photo conductor?
when light falls on the it its electrons become excited and become free for conductivity that's why selenium is a photo conductor
What is the wavelength of selenium?
The wavelength of selenium typically refers to the wavelength of light emitted by selenium when it is excited. Selenium emits light in the red part of the spectrum with a wavelength around 600-700 nanometers. This characteristic makes selenium useful in applications like photocopiers and photovoltaic cells.
What happens when selenium is exposed to light?
Selenium is photoconductive, meaning its electrical conductivity increases when exposed to light. This property is used in applications such as photocopiers and solar cells. However, prolonged exposure to bright light can degrade selenium's performance.
Why do photographers work with low light with selenium?
Photographers choose to work with low light in selenium toning because selenium toning has the ability to enhance the tonal range of black and white photographs, making subtle details in shadows more visible and increasing overall image contrast. This can help achieve a more dramatic and visually appealing final print.
What is a selenium Camera?
A selenium camera is a type of light metering system that uses a selenium cell to measure the amount of light available for a photograph. It is commonly found in older film cameras and works by converting light into an electrical current which helps to determine the optimal exposure settings for a photo.
What has the author Irene Rosenfeld written?
Irene Rosenfeld has written: 'Selenium: geobotany, biochemistry, toxicity, and nutrition' -- subject(s): Physiological effect, Selenium
Why selenium is photo conductor?
when light falls on the it its electrons become excited and become free for conductivity that's why selenium is a photo conductor
Why is the metal plate coated with selenium in a photocopier?
First a special selenium coated, flat metal plate is positively charged. Light stones through a lens then projects an image of the page to be copied onto the charged plate. Whenever the light falls on the selenium plate the plate becomes a conductor and the positive charge is conducted away from the selenium by the metal plate.
Does selenium have any colour?
Different allotropes of Selenium have different colors. They can be Black, Grey, Red or Purplish.
What is the excited state selenium?
Excited state selenium refers to selenium atoms or ions that have absorbed energy, causing their electrons to move to higher energy levels. This temporary configuration is unstable, and the electrons will eventually return to their original energy levels, releasing the absorbed energy as light. This process is the basis for selenium's use in photovoltaic cells and other light-sensitive technologies.
The black form of this nonmetal conducts electricity better when light is shined upon it and it is used in Xerox toner?
Selenium is the nonmetal that conducts electricity in its black form when light shines on it. But selenium is not a component of Xerox toner. Selenium is used in the older photoreceptor drums and belts that serve as the equivalent of film in a camera.
What has the author Michelle L Moore written?
Michelle L. Moore has written: 'Effects of selenium supplementation on plasma and milk of lactating women of habitually low selenium status' -- subject(s): Nutritional aspects, Nutritional aspects of Pregnancy, Physiological effect, Pregnancy, Selenium, Selenium in human nutrition
What is the use of selenium photocells?
Because of its photovoltaic and photoconductive properties, selenium is used in photocopying, photocells, light meters and solar cells. Its use as a photoconductor in plain-paper copiers once was a leading application but in the 1980s, the photoconductor application declined (although it was still a large end-use) as more and more copiers switched to the use of organic photoconductors. It was once widely used in selenium rectifiers.
