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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.
Wiki User
∙ 12y ago
Wiki User
∙ 16y agoI hope this helps, I just finished learning this in my Science class! Various elements in a star absorb light in different ways. The result is black lines on the spectroscope that determine which elements compose a star.
Wiki User
∙ 13y agoThe dark line appears because the energy of the light is absorbed by the matter at the frequency of the dark line. According to where that line is, an astronomer can tell what elements are in a certain star.
Wiki User
∙ 13y agoThe black lines in a spectrum are hydrogen. The thicker they are the more hydrogen is there is in the element you are looking at and vice versa.
What you are thinking about is an absorption spectrum. While light is shone through a cloud of something and the something absorbs those wavelengths that are of the same energy as the energy states of the electrons in the something. In this way you can identify elements, compounds and molecules.
Wiki User
∙ 10y agoA black line in a visible spectrum means either one of two things:
-- The source emits no radiation at that particular wavelength,
or, (more likely),
-- Between the source and your eye, there is some kind of material that absorbs
that particular wavelength.
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What were dark lines in the spectrum named for?
Dark lines especially in solar spectrum have been named as Fraunhofer lines. These line are good examples for line absorption spectrum
Is an atomic emission spectrum a continuous range of colors?
No. Atomic emission spectrum is non-contiuous and it is named as line spectrum.
What is the difference between a continuous spectrum an a line spectrum?
Dispersion, the separation of visible light into a spectrum, may be accomplished by means of a prism or a diffraction grating. Each different wavelength or frequency of visible light corresponds to a different color, so that the spectrum appears as a band of colors ranging from violet at the short-wavelength (high-frequency) end of the spectrum through indigo, blue, green, yellow, and orange, to red at the long-wavelength (low-frequency) end of the spectrum. In addition to visible light, other types of electromagnetic radiation may be spread into a spectrum according to frequency or wavelength. The spectrum formed from white light contains all colors, or frequencies, and is known as a continuous spectrum. Continuous spectra are produced by all incandescent solids and liquids and by gases under high pressure. A gas under low pressure does not produce a continuous spectrum but instead produces a line spectrum, i.e., one composed of individual lines at specific frequencies characteristic of the gas, rather than a continuous band of all frequencies. If the gas is made incandescent by heat or an electric discharge, the resulting spectrum is a bright-line, or emission, spectrum, consisting of a series of bright lines against a dark background. A dark-line, or absorption, spectrum is the reverse of a bright-line spectrum; it is produced when white light containing all frequencies passes through a gas not hot enough to be incandescent. It consists of a series of dark lines superimposed on a continuous spectrum, each line corresponding to a frequency where a bright line would appear if the gas were incandescent. The Fraunhofer lines appearing in the spectrum of the sun are an example of a dark-line spectrum; they are caused by the absorption of certain frequencies of light by the cooler, outer layers of the solar atmosphere. Line spectra of either type are useful in chemical analysis, since they reveal the presence of particular elements. The instrument used for studying line spectra is the spectroscope.
Why is the emission spectrum of hydrogen a line spectrum and not a continuous spectrum?
It's a line spectrum because of the quantization of energy- meaning you only see energy with levels n=1,2,3.... One would never see the energy level n=2.8 for instance- that would be the case if it were continuous rather than a line spectrum.
Why elements give line spectrum?
Because the spectra of elements is determined by the energy of transitions of electrons between two allowed quantum states. Since these energy differences can have only certain specified values, the spectrum consists of lines: The spectrum frequency values intermediate between the lines do not correspond to transitions between any two allowed quantum states and therefore do not appear in the spectrum
What were dark lines in the spectrum named for?
Dark lines especially in solar spectrum have been named as Fraunhofer lines. These line are good examples for line absorption spectrum
Is an absorption spectrum also called a bright line spectrum?
No, its an absorption spectrum
How can you Distinguish absorption spectrum from emission spectrum?
Emission spectra are bright-line spectra, absorption spectra are dark-line spectra. That is: an emission spectrum is a series of bright lines on a dark background. An absorption spectrum is a series of dark lines on a normal spectrum (rainbow) background.
What does a star's dark-line spectrum reveal?
The dark lines reveal the atoms that are associated with the stars atmosphere. The dark lines are atom energy absorption signatures.
What does a stars dark line spectrum reveal?
The dark lines reveal the atoms that are associated with the stars atmosphere. The dark lines are atom energy absorption signatures.
Who discovered the dark line spectrum?
Lippershey first discovered a dark-line spectrum.
Continuous spectrum with dark lines where light is absorbed?
dark-line spectrum...
What kind of spectrum is used to determine the composition of a planet's atmosphere?
dark line 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.
The absorption spectrum of argon has a line at 515 nm what is the energy of this line?
3.86 x 10-19 J
The spectrum produced by glowing high-density gas is an a bright line emission b dark line absorption c chemical composition d temperature c continuous?
a Edit: The question is very mixed up, but I think I get the idea. It's obviously an emission spectrum. Because it is a high density gas the spectrum should be CONTINUOUS.
What causes spectra lines?
Absorption of energy at atom energy levels cause the line spectrum.
