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Related Concept Videos

Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
Absorption of Radiation01:05

Absorption of Radiation

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Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
Interaction of EM Radiation with Matter: Spectroscopy01:12

Interaction of EM Radiation with Matter: Spectroscopy

Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...

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Related Experiment Video

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Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
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Published on: May 9, 2014

Radiation exchange.

J H Taylor

    Applied Optics
    |May 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study advocates for enhanced radiation exchange physics education. It introduces radiance and field of view concepts, demonstrating universal thermal radiation with a simple experiment.

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    Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

    Published on: March 11, 2021

    Area of Science:

    • Physics Education
    • Thermal Radiation Transfer

    Background:

    • Introductory physics courses often lack comprehensive coverage of radiation exchange.
    • Understanding thermal radiation is crucial for various scientific and engineering disciplines.

    Purpose of the Study:

    • To highlight the importance of including radiation exchange in introductory physics.
    • To present the fundamental theory and concepts of radiation exchange.
    • To offer a practical demonstration for educational purposes.

    Main Methods:

    • Theoretical presentation of radiation exchange principles.
    • Development of the concepts of radiance and field of view.
    • Description of a simple lecture demonstration.

    Main Results:

    • Provides a foundational understanding of radiation exchange theory.
    • Explains key concepts like radiance and field of view.
    • Offers a practical, observable demonstration of thermal radiation.

    Conclusions:

    • Integrating radiation exchange into introductory physics is beneficial.
    • The presented concepts and demonstration can enhance student comprehension.
    • Emphasizes that all objects emit thermal radiation.