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Videos de Conceptos Relacionados

Propagation of Waves01:07

Propagation of Waves

When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Plane Electromagnetic Waves II01:29

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Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
Travelling Waves01:04

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A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is water;...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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The Wave Nature of Light02:12

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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
Kepler's First Law of Planetary Motion01:10

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In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
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Published on: July 2, 2012

Las primeras observaciones de ondas de plasma en Neptuno.

D A Gurnett, W S Kurth, R L Poynter

    Science (New York, N.Y.)
    |December 15, 1989
    PubMed
    Resumen

    La Voyager 2 observó diversas ondas de plasma y impactos de polvo en Neptuno. Estos hallazgos revelan detalles sobre la magnetosfera de Neptuno y la dinámica del sistema de anillos.

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    Área de la Ciencia:

    • Ciencias planetarias Ciencias planetarias.
    • Física del plasma es la física del plasma.
    • Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera

    Sus antecedentes:

    • La magnetosfera y el sistema de anillos de Neptuno son complejos y no se comprenden completamente.
    • Las misiones anteriores proporcionaron datos limitados sobre los fenómenos de las ondas plasmáticas y la distribución del polvo.

    Objetivo del estudio:

    • Para analizar los datos de ondas de plasma y los impactos de partículas de polvo detectados por la Voyager 2 durante su encuentro con Neptuno.
    • Para caracterizar el entorno de plasma y la distribución del polvo dentro de la magnetosfera y el plano de anillos de Neptuno.

    Principales métodos:

    • Utilizó el instrumento de ondas de plasma Voyager 2 para detectar y analizar varias ondas de plasma.
    • Impactos de partículas de polvo registrados y cuantificados en la nave espacial durante cruces del plano del anillo.

    Principales resultados:

    • Se observaron numerosas ondas de plasma, incluidas las oscilaciones del plasma de electrones, la turbulencia electrostática, el coro, el silbido, las ondas de ciclotrón de electrones y las ondas de resonancia híbrida superior.
    • Se detectaron emisiones de radio de baja frecuencia que se propagan en un haz de disco a lo largo del plano magnético ecuatorial.
    • Se registraron altas tasas de impactos de partículas de polvo de tamaño micrométrico, concentradas en un denso disco alrededor del plano ecuatorial.

    Conclusiones:

    • Las ondas de plasma observadas proporcionan información sobre los procesos dinámicos dentro de la magnetosfera interna de Neptuno.
    • La distribución de las partículas de polvo sugiere una estructura de disco localizada y densa dentro de los anillos de Neptuno, con un halo tenue más extendido.