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Related Concept Videos

Adiabatic Processes for an Ideal Gas01:18

Adiabatic Processes for an Ideal Gas

When an ideal gas is compressed adiabatically, that is, without adding heat, work is done on it, and its temperature increases. In an adiabatic expansion, the gas does work, and its temperature drops. Adiabatic compressions actually occur in the cylinders of a car, where the compressions of the gas-air mixture take place so quickly that there is no time for the mixture to exchange heat with its environment. Nevertheless, because work is done on the mixture during the compression, its...
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

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A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to the...
UV–Vis Spectroscopy: Beer–Lambert Law01:09

UV–Vis Spectroscopy: Beer–Lambert Law

The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The modern...
IR Absorption Frequency: Hybridization01:21

IR Absorption Frequency: Hybridization

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UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

UV–Vis Spectroscopy: Woodward–Fieser Rules

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Related Experiment Video

Updated: Jun 19, 2026

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics
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Published on: October 27, 2017

Ideal wavelength filters using semiadiabatic coupling.

B E Little

    Optics Letters
    |November 3, 2009
    PubMed
    Summary

    Adiabatic coupling enables robust wavelength-selective filters with flat passbands and high rejection. This method, while requiring longer devices, simplifies fabrication and filter design.

    Area of Science:

    • Photonics
    • Optical Engineering

    Background:

    • Wavelength-selective filters are crucial optical components.
    • Achieving ideal filter characteristics like flat passbands and high rejection is challenging.
    • Existing methods often involve complex fabrication or synthesis.

    Purpose of the Study:

    • To demonstrate the realization of ideal wavelength-selective filters using adiabatic coupling.
    • To analyze the filter response and its dependence on physical construction.
    • To assess the trade-offs, such as device length, associated with this method.

    Main Methods:

    • Utilizing adiabatic coupling principles for filter design.
    • Physically constructing filters to limit adiabatic power exchange to specific wavelengths.
    • Analyzing the resulting filter response characteristics.

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    Related Experiment Videos

    Last Updated: Jun 19, 2026

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    Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
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    Published on: March 13, 2013

    Main Results:

    • Adiabatic coupling yields filters with flat transmission passbands and large out-of-band rejection.
    • The filter response is boxlike, offering robustness.
    • Device length increases compared to optimized filters for similar performance.

    Conclusions:

    • Adiabatic coupling provides a robust and simplified approach to designing high-performance wavelength-selective filters.
    • The method offers a practical alternative despite requiring longer device lengths.
    • Filter response can be accurately predicted using basic physical principles.