Video Experimental Relacionado
Updated: Jul 8, 2026

11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
El color de la superficie de Venus
Resumen
Venus Venus Venus es el nombre de Venus.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- La superficie de Venus exhibe una apariencia oscura e incolora en luz visible.
- La espesa atmósfera venusiana imparte un tono naranja a la radiación incidente.
Objetivo del estudio:
- Para analizar imágenes multiespectrales de la superficie basáltica de Venus.
- Para determinar la composición mineralógica de la superficie venusiana.
- Para investigar el estado de oxidación de los materiales de la superficie venusiana.
Principales métodos:
- Procesamiento de imágenes multiespectrales de la misión Venera 13.
- Corrección para la dispersión y absorción de la luz atmosférica.
- Análisis de laboratorio de los espectros de reflectancia del material basáltico a altas temperaturas.
- Comparación de los datos de Venera 13 con las observaciones de Venera 9 y 10.
Principales resultados:
- La superficie de Venus aparece oscura y carece de color significativo en las longitudes de onda visibles después de la corrección atmosférica.
- Los espectros de laboratorio sugieren que los minerales de superficie contienen hierro férrico o ferroso.
- La alta reflectancia del infrarrojo cercano en sitios cercanos indica la presencia de minerales férricos.
Conclusiones:
- La superficie basáltica de Venus es consistente con ensamblajes minerales que contienen hierro.
- La evidencia sugiere que el material de la superficie venusiana puede estar relativamente oxidado, particularmente en los sitios 9 y 10 de Venera.
Videos de Conceptos Relacionados
Emission Spectra
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Hückel's Rule Diagram of π MOs: Frost Circle
The Frost circle or the inscribed polygon method is a graphical method for determining the relative energies of π molecular orbitals (MOs) for planar, fully conjugated, and monocyclic compounds. This method was first described by A. A. Frost and Boris Musulin in 1953.
A Frost circle is constructed by drawing a polygon whose number of edges is equal to the number of carbons of the given cyclic system, with one of the vertices pointing down. Then, a circle is drawn enclosing the polygon so that...
A Frost circle is constructed by drawing a polygon whose number of edges is equal to the number of carbons of the given cyclic system, with one of the vertices pointing down. Then, a circle is drawn enclosing the polygon so that...
Flame Photometry: Overview
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
Flame Photometry: Lab
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...

