Video Experimental Relacionado
Updated: Jul 12, 2026
09:07
Fluorescence In Situ Hybridization on DNA Halo Preparations to Reveal Whole Chromosomes, Telomeres and Gene Loci
Published on: March 4, 2021
El halo de 46 grados y sus arcos
Science (New York, N.Y.)
|November 9, 1979
Resumen
La simulación de patrones de luz de los cristales de hielo revela cómo diferentes orientaciones crean fenómenos ópticos atmosféricos como halos y arcos. Esta investigación explica la formación de varias pantallas de luz del cielo causadas por cristales de hielo hexagonales.
Área de la Ciencia:
- La óptica atmosférica es la óptica atmosférica.
- La cristalografía es una técnica de cristalografía.
- Diseminación de la luz dispersión de la luz.
Sus antecedentes:
- Los cristales de hielo, típicamente prismas hexagonales, refractan y reflejan la luz solar.
- La orientación de los cristales de hielo influye significativamente en los fenómenos ópticos atmosféricos resultantes.
Objetivo del estudio:
- Para simular y analizar los patrones de luz producidos por cristales de hielo hexagonales con varias orientaciones.
- Para entender los mecanismos de formación de halos y arcos en el cielo.
Principales métodos:
- Se utilizó el rastreo de rayos por computadora para simular el paso de la luz a través de caras de prisma hexagonales.
- Se realizaron simulaciones para diferentes distribuciones de orientaciones de cristales y elevaciones solares.
Principales resultados:
- Los cristales orientados al azar producen un halo de 46 grados.
- Los cristales de las placas horizontales crean arcos circumzenitales y circumhorizontales.
- Los cristales de las columnas horizontales generan arcos supralateral e infralateral.
- Los cristales de placas giratorias forman arcos cerca del halo de 46 grados.
Conclusiones:
- La forma y la orientación de los cristales son determinantes críticos de los fenómenos ópticos atmosféricos observados.
- Las simulaciones por computadora modelan eficazmente las complejas interacciones de la luz con los cristales de hielo para explicar los patrones de luz del cielo.
Videos de Conceptos Relacionados
01:27Halo Effect
The halo effect is a cognitive bias in which an individual's overall impression influences judgments about their specific traits. This psychological phenomenon leads people to associate positive characteristics with those they perceive as generally good and negative characteristics with those they view as bad. This effect is particularly influential in social perception, professional evaluations, and decision-making processes.The Psychological Basis of the Halo EffectThe halo effect is rooted...
01:27Polar Coordinates: Problem Solving
Directional radiation patterns are central to antenna analysis, as they illustrate how signal strength varies with direction. These patterns are often modeled using polar plots, where the radial distance from the origin represents signal intensity at a given angle. A commonly used idealized form is the four-lobed rose curve, which captures the concept of directional beams in a simplified mathematical form.The four-lobed rose curve, described by r = cos(2θ), features four symmetric lobes, each...
01:26Integration Applied to Polar Coordinates to Find Arc Lengths
In polar coordinates, a plane curve is described by a radial distance r from a fixed point, called the pole, and an angle θ measured from a reference direction. This system is especially useful for paths that naturally involve rotation, such as an expanding spiral followed by a search drone. If the hiker’s last known position is treated as the pole, then the drone’s location at any instant can be represented by the polar equation r = f(θ), where the distance from the pole changes as the drone...
01:03Centroid of a Body: Problem Solving
The centroid of a body is a crucial concept in engineering and physics. Finding the centroid of a body can help determine its stability, its balance point, and even its design. In this context, consider a thin wire bent in the form of a quarter circular arc. Polar coordinates are used to calculate the centroid. The wire is first divided into small differential elements of a length equal to the radius multiplied by the differential angle.
The x-coordinates and y-coordinates of each element's...
The x-coordinates and y-coordinates of each element's...
02:38Electrophilic Addition to Alkynes: Halogenation
Introduction
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
01:29Radian and Degree Measure
Angular motion is measured using two primary units: degrees and radians. These units describe the extent of rotation around a fixed point. A complete rotation corresponds to 360 degrees or 2π radians, depending on the unit used. Although both represent the same angular displacement, they differ in origin and application.Degrees divide a circle into 360 equal segments. Due to its intuitive structure, this unit is historically rooted and widely used in general applications such as navigation,...