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Absorption lines in a photographic spectrum appear as dark lines where specific wavelengths of light are absorbed by elements in a celestial object. These lines indicate the presence of elements in the object's atmosphere and can be identified by comparing their positions with known spectral lines of elements on Earth.
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What does the absorption spectrum show us or tell us?
The absorption spectrum shows the specific wavelengths of light that are absorbed by a material, indicating the energy levels of electrons in the substance. By analyzing the absorption spectrum, scientists can identify the chemical composition of the material and understand its electronic structure.
How do emission and absorption spectrums tell us about the composition of objects in our universe?
Each chemical element has a specific emission or absorption spectrum.
What is an absorption transmission spectrum and what does it tell you about pigments?
An absorption transmission spectrum shows how much light is absorbed by a pigment at different wavelengths. It provides information about which wavelengths of light the pigment absorbs most strongly, which can help identify the pigment and understand its color properties.
Spectrum gives the what of the star's gases?
Spectrum gives information about the composition of a star's gases by breaking down the incoming radiation into its constituent wavelengths. This information helps astronomers determine the elements present in the star's atmosphere and its temperature.
What kind of spectrum is used to determine the composition of a planet's atmosphere?
An absorption spectrum is typically used to determine the composition of a planet's atmosphere. This type of spectrum shows specific wavelengths of light that are absorbed by different gases in the atmosphere, allowing scientists to identify the presence of specific elements or compounds.
What does the absorption spectrum show us or tell us?
The absorption spectrum shows the specific wavelengths of light that are absorbed by a material, indicating the energy levels of electrons in the substance. By analyzing the absorption spectrum, scientists can identify the chemical composition of the material and understand its electronic structure.
How do emission and absorption spectrums tell us about the composition of objects in our universe?
Each chemical element has a specific emission or absorption spectrum.
What conditions produce a dark-line spectrum?
An absorption spectrum can tell the astronomer or physicist what elements are in the starlight being observed. A diffraction grating is used to split the incoming light into a spectrum of colors. Sodium, for example, causes dark Fraunhofer lines at known points in the visible spectrum. Helium was discovered in the solar spectrum by Bunsen and Kirchoff using this technique. Hence the name derived from Helios for the Sun.
What is an absorption transmission spectrum and what does it tell you about pigments?
An absorption transmission spectrum shows how much light is absorbed by a pigment at different wavelengths. It provides information about which wavelengths of light the pigment absorbs most strongly, which can help identify the pigment and understand its color properties.
How can astronomers tell what a distant object is made of?
Astronomers are able to identify chemicals in distant space with the use of spectral analysis. This breaks the light apart into a spectrum and find either emission lines or absorption lines and identifies which elements are present.
Why is there a line spectrum over a continuous spectrum in a spectroscope?
The lines in a spectroscope tell what element(s) are being observed. The continuous color are background noise or put there for a reference.
Why might scientists mainly astronomers study the color of metals in a flame?
The colours with which an element (metal or other) burns in a flame are the same colours which are absorbed by that element in the sun's spectrum. The colours are very specific to each element and show up as distinct black lines in the solar spectrum. By studying the spectrum it is possible to tell what elements are in the sun [or star] and also their relative abundance.If a star is moving away from us absorption lines are red-shifted [move towards the red end of the spectrum]. The faster the star is moving away, the greater the red-shift. Also, as Hubble discovered, the greater the red-shift, the further away the star is. So the red shift in the absorption spectrum is a measure of not only how fast the star is receding from us but also how far it is. This allows us to tell whether two stars which are apparently in the same direction are actually close together or simply a coincidental alignment of their lines of sight.
Why dark line appears in absorption spectrum?
Dark lines in an absorption spectrum are caused by material existing between the source of light and the observation point. This material can absorb light from the source at specific energies corresponding to the excitation energies of the molecules, atoms, or ions making up the material.
Spectrum gives the what of the star's gases?
Spectrum gives information about the composition of a star's gases by breaking down the incoming radiation into its constituent wavelengths. This information helps astronomers determine the elements present in the star's atmosphere and its temperature.
Figure 10.1 shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis Why are they different?
The absorption spectrum shows which wave lengths are absorbed in each individual type of chlorophyll. The action spectrum shows which wavelengths of light are most effective for photosynthesis.
What kind of spectrum is used to determine the composition of a planet's atmosphere?
An absorption spectrum is typically used to determine the composition of a planet's atmosphere. This type of spectrum shows specific wavelengths of light that are absorbed by different gases in the atmosphere, allowing scientists to identify the presence of specific elements or compounds.
Does the absorption spectra tell astronomers if a star is moving towards the earth?
No, absorption spectra do not directly tell astronomers if a star is moving towards Earth. Doppler shifts in the absorption lines of a star's spectrum can indicate its motion along the line of sight, but to determine if a star is moving towards Earth, astronomers would typically use techniques such as measuring changes in its position over time through methods like astrometry or observing its spectroscopic radial velocity.
