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Why is the solar spectrum an absorption spectrum rather than an emission spectrum?
The sun has 3 layers - the photosphere, the chromosphere, the corona.
Photosphere is the visible surface and gives the absorption spectrum.
Chromosphere is the pinkish discharge encircling the Sun, visible only during a total eclipse. This gives the emission spectrum.
Corona is the halo encircling the chromosphere. THis gives the coronal spectrum.
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Does the Sun produce a continuous spectrum or an absorption spectrum?
The photosphere of the sun doesn't really produce a continuous spectrum; there are discontinuities corresponding to energy levels of various chemical elements, called spectral lines. Notably Helium was discovered in the absorption lines of the solar spectrum and only later discovered on Earth.
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.
Which substance present in the atmosphere is responsible for the absorption of solar radiation with a wavelength less than 242 nm?
Oxygen is responsible for the absorption of solar radiation with a wavelength less than 242nm. UV radiation splits oxygen into atoms and the atoms combine with other oxygen molecules to form ozone. Generally, all multi-atom?æ compounds are capable of absorbing UV radiation when the wavelength is short.
What is the significance of the PL spectrum in determining the characteristics of a material?
The PL spectrum, or photoluminescence spectrum, is important in determining the characteristics of a material because it provides information about the material's electronic structure, defects, and impurities. By analyzing the PL spectrum, scientists can gain insights into the material's optical properties, such as bandgap energy, carrier concentration, and recombination processes. This information is crucial for understanding the material's performance in various applications, such as solar cells, LEDs, and sensors.
Where did the name of the element helium come from?
It comes from the Greek word "helios" meaning "sun" after Pierre-Jules-César Janssen observed a new yellow line (587.49 nm) in the solar spectrum of the solar eclipse of 1868.
How does the spectrum of helium differ from the spectrum of white light from the Sun?
The spectrum of helium consists of distinct lines at specific wavelengths, known as emission lines, due to the transition of electrons between energy levels. In contrast, the spectrum of white light from the Sun is continuous, with all visible wavelengths present. The presence of absorption lines in the solar spectrum, caused by elements in the Sun's atmosphere absorbing specific wavelengths, further distinguishes it from the discrete emission lines of helium.
What is the relation between the electromagnetic spectrum of solar radiation and the absorption spectrum of chlorophyll?
Solar radiation peaks in energy in the mid-yellow range. Chlorphyll's absorption also peaks in this range. It is a demonstration of the adaption of plants to optimizing their production efficiency.
What does the presence of dark lines in the solar spectrum mean?
The dark lines represents the absorption of energy at that frequency, E=hf.
Are there as many absorption lines in the solar spectrum as there are elements present in the Sun?
There are a lot more. Each element has several possible absorption lines. In fact the element iron has several hundred lines.
Fraunhofer lines in the solar spectrum are actually?
Fraunhofer lines are dark absorption lines in the solar spectrum caused by specific elements absorbing certain wavelengths of light. These lines help astronomers identify the chemical composition of the Sun and other stars because each element absorbs light at characteristic wavelengths, leaving dark lines in the spectrum.
Does the Sun produce a continuous spectrum or an absorption spectrum?
The photosphere of the sun doesn't really produce a continuous spectrum; there are discontinuities corresponding to energy levels of various chemical elements, called spectral lines. Notably Helium was discovered in the absorption lines of the solar spectrum and only later discovered on Earth.
What layer of the sun is responsible for the absorption of lines in the solar spectrum?
Light coming up from the centre of the Sun goes through the outer layer where it encounters absorbtion by elements in the outer layer, and this gives rise to absorbtion lines in the spectrum.
What has the author Marc S Allen written?
Marc S. Allen has written: 'High resolution atlas of the solar spectrum 2678-2831 A' -- subject- s -: Charts, diagrams, Solar Spectrum, Spectrum, Solar, Spectrum, Ultraviolet, Ultraviolet Spectrum
What has the author Charles Edward St John written?
Charles Edward St. John has written: 'Revision of Rowland's Preliminary table of solar spectrum wave-lengths' -- subject(s): Solar Spectrum, Spectrum analysis, Spectrum, Solar
What has the author J Houtgast written?
J. Houtgast has written: 'The variations in the profiles of strong Fraunhofer lines along a radius of the solar disc' -- subject(s): Solar Spectrum, Spectrum analysis, Spectrum, Solar
What is the spectrum of the moon?
The moon reflects sunlight, so its spectrum is similar to that of the Sun. It follows a blackbody curve with peaks in the visible range. The moon also shows absorption lines from elements in its surface materials.
What does absorption use?
solar energy
