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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

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UV–Vis Spectrum01:30

UV–Vis Spectrum

When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
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Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis
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Published on: September 27, 2019

Light Sources in the 0.15-20-micro Spectral Range.

M W Cann

    Applied Optics
    |January 15, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study surveys light sources for the 0.15-20-micrometer spectral range, focusing on intensity, stability, and uniformity. It details arc discharge, glow discharge, and incandescent sources for scientific applications.

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    Published on: August 22, 2019

    Area of Science:

    • Spectroscopy
    • Optical Engineering
    • Materials Science

    Background:

    • Accurate spectral measurements require reliable light sources.
    • The 0.15-20 micrometer range is crucial for various scientific investigations.
    • Existing reviews may not cover the breadth of available sources.

    Purpose of the Study:

    • To survey and compare light sources for the 0.15-20 micrometer spectral range.
    • To provide data on source intensity, stability, and output uniformity.
    • To guide the selection of appropriate light sources for scientific applications.

    Main Methods:

    • Comprehensive literature review.
    • Information gathering from manufacturers and experts.
    • Categorization of sources into Arc Discharge, Glow Discharge, Incandescent, and Miscellaneous.

    Main Results:

    • Detailed descriptions of various continuum and line sources.
    • Comparative analysis of source advantages regarding intensity, stability, and uniformity.
    • Identification of suitable sources for the specified spectral range.

    Conclusions:

    • The study provides a valuable resource for researchers needing light sources in the 0.15-20 micrometer range.
    • Understanding source characteristics is key to successful experimental design.
    • Arc discharge, glow discharge, and incandescent sources offer diverse options for scientific use.