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Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Variables Affecting Phosphorescence and Fluorescence

Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
The Bohr Model02:18

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Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as the nucleus...
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The de Broglie Wavelength

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Updated: Jun 16, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

Phenomenological model of scintillation.

W N Peters

    Applied Optics
    |February 19, 2010
    PubMed
    Summary

    This study presents a model for atmospheric scintillation affecting exoatmospheric signals. It finds that viewing geometry and atmospheric isoplanatism significantly impact measured scintillation, similar to the source

    Area of Science:

    • Astronomy
    • Atmospheric Physics
    • Optical Engineering

    Background:

    • Atmospheric scintillation affects astronomical observations.
    • Understanding scintillation is crucial for clear signal reception from exoatmospheric sources.

    Purpose of the Study:

    • To develop a model characterizing atmospherically induced scintillation.
    • To analyze the factors influencing scintillation levels for exoatmospheric signals.

    Main Methods:

    • Development of a theoretical model for atmospheric scintillation.
    • Comparison of model predictions with experimental data for verification.

    Main Results:

    • Scintillation reduction with increasing target subtense is influenced by viewing geometry and atmospheric isoplanatism.

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    Published on: March 2, 2021

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    Last Updated: Jun 16, 2026

    Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
    10:35

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    In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
    06:49

    In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

    Published on: March 2, 2021

  • The model accurately predicts experimental scintillation data.
  • Conclusions:

    • Atmospheric scintillation is a complex phenomenon influenced by multiple factors.
    • The presented model provides a robust framework for understanding and predicting scintillation effects.