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Related Concept Videos

Standing Electromagnetic Waves01:15

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Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
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James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
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The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
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The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Ultralong waveguide grating antenna enabled by evanescent field modulation: publisher's note.

Weiming Yao, Zhengquan Huang, Jiaxin Chen

    Optics Letters
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    Summary

    This publisher's note corrects a previous publication in Optics Letters. The correction pertains to volume 47, page 5397, published in 2022.

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    Area of Science:

    • Optics and Photonics
    • Scientific Publishing

    Background:

    • A previous article published in Optics Letters contained an error.
    • Accurate scientific records are crucial for research integrity.

    Purpose of the Study:

    • To formally correct an error in a previously published article.
    • To ensure the scientific record is accurate and reliable.

    Main Methods:

    • Identifying the specific publication requiring correction (Opt. Lett. 47, 5397 (2022)).
    • Issuing a formal publisher's note detailing the correction.

    Main Results:

    • The publisher's note provides a correction to the specified article.
    • The correction ensures the accuracy of the published scientific data.

    Conclusions:

    • This note rectifies an error, maintaining the integrity of the scientific literature.
    • Accurate dissemination of research findings is paramount.