Spectrum
Cosmos is a unique astronomy reference written by research astronomers.
Our encyclopedia entries are for a general audience who wish to know detailed information on a wide range of astronomical topics.
Spectrum Contrast - Thermal vs. Cosmic Rays
These two spectra show the difference between thermal and synchrotron emission. In the thermal spectrum (top), many narrow features, or lines, are apparent.
Definition: spectrum (plural: spectra): A plot of the intensity of light at different frequencies. Or the distribution of wavelengths and frequencies.
Space Tragedies9 Planets in Nine DaysAstronomy 101
Astronomy Dictionary ...
Flash Spectrum
Related Category: Astronomy: General
see chromosphere.
More on Flash Spectrum
Chromosphere - (kr´msfr´´) [Gr.
Visible spectrum
From Wikipedia, the free encyclopedia
(Redirected from Optical spectrum) ...
A spectrum of absorption lines or bands, produced when light from a hot source, itself producing a continuous spectrum, passes through a cooler gas.
"The spectrum of a planet is like a fingerprint. It provides key information about the chemical elements in the planet's atmosphere," says Markus Janson, lead author of a new paper describing the results presented in the Astrophysical Journal.
If the spectrum is composed primarily of thermal radiation emitted by the object itself, an emission spectrum occurs.
Some bodies emit light more or less according to the blackbody spectrum.
Continuous spectrum
Not drawn to scale.
After infra-red comes visible light. This is the range in which the sun and stars similar to it emit most of their radiation.
Electromagnetic Spectrum
This diagram shows the types of wavelengths going from longest to shortest. Image Credit: NASA
all the wavelengths of visible and invisible light. Visible light is near the center of the spectrum.
spectrum
1. the energy emitted by a radiant source 2. the entire range of electromagnetic radiation (light)
speed of light ...
SPECTRUM
A band of colors which forms when visible light passes through a prism. The band ranges in color from violet (shorter wavelength) to red (longer wavelength).
Spectrum The light of an object spread out like a rainbow. As well as this continuous spectrum, a star normally shows a distinctive set of dark and light lines which are characteristic of its composition.
Spectrum: The band of colors, from violet through red, obtained by passing white light through a prism (or another device that spreads light out into its component colors).
Spectrum: A plot of the intensity of light at different frequencies. Or the distribution of wavelengths and frequencies.
Spectrum- the range of color produced when light is split up by a prism of diffraction grating
Spicules- grass-like patterns of gas seen in the solar atmosphere ...
Spectrum -- A range of frequencies or wavelengths.
SSA -- Solid State Amplifier in a spacecraft telecommunications subsystem, the final stage of amplification for downlink.
spectrum
An image of light broken up into its component frequencies, appearing as a rainbow of colours corresponding to the various frequencies.
speed of light
The fastest known speed possible at 299,792.458 kilometres per second.
Spectrum
electromagnetic radiation arranged in order of wavelength. A rainbow is a natural spectrum of visible light from the Sun.
Spectrum
(a) The breakdown of light into a rainbow of colors. A good spectrum reveals a star's spectral type, radial velocity (from the spectrum's Doppler shift), and metallicity. (plural: spectra) ...
Spectrum In the original meaning, the spread of colors seen in the rainbow, covering all pure colors the eye can see. Spectrum of a substance, e.g. of an atomic element, is the collection of spectral lines emitted by it.
THE SPECTRUM OF HYDROGEN
Absorption and emission of photons by a hydrogen atom are illustrated schematically in Figure 4.10. Figure 4.
Spectrum
The spectrum of aurora consists of a number of lines. Numerous measurements have been made of the wavelengths of the brightest. One line, in the yellow green, is so dominant optically as often to be described as the auroral line.
Mass Spectrum: The pattern of the relative abundances of ions of different atomic or molecular mass (mass-to-charge ratio) within a sample. It frequently refers to the measured relative abundances of isotopes of a given element.
Full-spectrum dominance is a military concept whereby a joint military structure achieves control over all elements of the battlespace using land warfare, air warfare, sea warfare and space warfare based assets....
.
Flash Spectrum
The emission spectrum of the chromosphere that is visible for the few seconds during a total solar eclipse when the moon has covered the photosphere but has not covered the chromosphere.
Flat Universe ...
Power Spectrum
Poynting-Robertson Effect
An effect of radiation pressure on a small particle orbiting the Sun that causes it to spiral slowly into the Sun.
A thermal spectrum is produced by atoms that are closely packed together. The energy levels of the atoms are distorted by their neighboring atom's electrons. This smears out the normally sharp spectral lines (they become fatter).
Spectrum, in optics, the arrangement according to wavelength of visible, ultraviolet, and infrared light.
Spectrum of blue sky clearly showing absorption peaks of water vapor and oxygen in the atmosphere.
spectrum auctions
Geometric Transformations in Two Dimensions
Space heaters are 100% efficient ...
Spectrum (plural = spectra) The distribution of energy wavelengths and frequencies.
More about the energy spectrum...
spectrum See electromagnetic spectrum.
speed of light The fastest possible speed, according to the currently known laws of physics. Electromagnetic radiation exists in the form of waves or photons moving at the speed of light.
SPECTRUM
The spectrum is the band of colors that white light is composed of, in the order: red, orange, yellow, green, blue, indigo, violet (from long to short wavelength). first discovered that sunlight could be divided into the visible spectrum.
spectrum - (n.)
An arrangement of electromagnetic radiation according to wavelength.
spin-orbit coupling - (n.) ...
spectrum - The array of colors or wavelengths obtained when light from a source is dispersed, as in passing it through a prism or grating.
Spectrum
The entire range of electromagnetic rays from the longest radio waves to the shortest gamma rays.
Spectrum analysis of the light from exterior galaxies shows that the stars making up these systems are composed of the same chemical elements known on earth.
Spectrum
Grass-like patterns of gas seen in the atmosphere of the Sun.
Spicules
The range of colors produced when visible light passes through a prism.
Spectrum, Electromagnetic: The distribution of light separated in order of some varying characteristic such as wavelength or frequency. The "electromagnetic spectrum" refers to the full range of possible frequencies and wavelengths of light.
A spectrum that contains absorption lines.
accretion disk
The whirling disk of gas that form around a compact object such as a white dwarf, neutron star or black hole as matter is drawn in.
A spectrum is the result of splitting up this light into its constituent colours and it is by studying spectra that astrophysicists have been able to make their most important discoveries.
How is a spectrum produced?
By spectrum analysis, we know that sunspots have strong magnetic field, about 1000 times stronger than the Sun's average. Also, sunspots usually appear in pairs.
The spectrum of Avior is a composite spectrum characteristic of a K3III giant and a B2V main sequence star. The giant would be an orange star with an effective temperature of 4100 K, a mass of about 4.
The spectrum of quiescent prominences seen against the sky is essentially similar to the chromosphere--i.e., it reflects the properties of a gas excited primarily by photospheric emission.
The spectrum below is an intensity plot of a star. Note the characteristic absorption line features including strong lines for Hα, Hβ, Hγ and Hδ - the Balmer Series.
The spectrum of
planet b was obtained
through subtraction
when Star A eclipsed
the planet (more).
The spectrum produced by such a source is not at all continuous but consists of lines or bands that are characteristic of the atoms or molecules in the gas.
The spectrum of the explosion confirmed the heavy element production (elements heavier than iron). This was seen in the way that various elements would appear and then decay over time.
The spectrum of synchrotron emission results from summing the emission spectra of individual electrons. As a electron spirals around the magnetic field, it emits radiation over a range of frequencies peaking at a critical frequency,v0.
This spectrum captured by the Moessbauer spectrometer onboard Spirit shows the presence of three different iron-bearing minerals in the soil. One of these minerals has been identified as olivine, a shiny green rock commonly found in lava on Earth.
LIGHT SPECTRUM
Light can be broken up into into its component colors (for example, by passing light through a prism) - this is a spectrum.
The X-ray spectrum obtained with the Reflection Grating Spectrometer (RGS) of the space telescope XMM-Newton is the best obtained so far of such a system. It reveals unprecedented details of its gaseous environment.
Continuous Spectrum - A spectrum containing neither emission nor absorption lines
Convection - The process of energy transport in which heat is carried by hot, rising and cool, falling currents or bubbles of liquid or gas ...
emission spectrum (bright-line spectrum): A spectrum containing emission lines.
energy: The capacity of a natural system to perform work - for example, thermal energy.
CONTINUOUS SPECTRUM
A continuous spectrum is a spectrum of emitted light that contains all wavelengths of the colors that compose white light (red, orange, yellow, green, blue, indigo, violet, from long to short wavelength).
The emitted spectrum in nanometers is at the bottom of the figure. The upper spectra have z values of 0.02, 0.06, and 0.25 respectively. Note that wavelengths move into the red as z increases.
DOPPLER REDSHIFT ...
charge spectrum The range and magnitude of electric charges with reference to cosmic rays at a specific altitude.
Multichannel Spectrum Analyzer (MCSA)
An instrument with a large number of channels for analyzing a signal in small frequency bins. Used for rapid radio frequency analysis.
Optical ...
spark spectrum (NASA SP-7, 1965) The spectrum of an ion. The degree of ionization, or order of the spectrum, is indicated by a Roman numeral following the symbol for the element.
 See also: Light, Earth, Energy, Sun, Solar
|
