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Spectrographs are instruments that separate EM radiation (primarily light) into a spectrum of frequencies and record the data. The intensity of radiation at the different frequencies can be used to ascertain information about the source of the radiation or the material through which it is passing.
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What are two kinds of information astronomers can collect from stars by using spectrographs?
compositions and temperatures
What are some common uses for rhenium?
Rhenium that is used for flash lamps for photograph. Used for filaments for mass spectrographs and ion gages.
How astronomy is related to technology?
All of the observational tools needed by astronomers: astrolabes, quadrant, clocks, sextants, octant, spectrographs, polarimeters, telescopes, optical mount, radio telescopes, space telescopes, etc. are products of various technologies.
Was helium included in Mendeleev's original periodic table?
No, helium was not included in Mendeleev's original periodic table. It was discovered in 1868, a year after Mendeleev's table was published in 1869.
What does a septrograph do?
Spectrographs (assuming that's what you mean) are mostly used in astronomy. By analyzing the spectrum of radiation of a star, astronomers can learn how hot it is, and how much of it is composed of hydrogen, helium or other elements. For example, "red giant" stars are relatively cool enough for molecules to exist. The spectra of molecules have been detected in red giant stars.
How do police use spectrographs to identify cars?
they look at it
What do scientists study to learn about stars?
spectrographs
What are two kinds of information astronomers can collect from stars by using spectrographs?
compositions and temperatures
What are some common uses for rhenium?
Rhenium that is used for flash lamps for photograph. Used for filaments for mass spectrographs and ion gages.
Can spectroscopes be put in space or on Earth or both?
All major astronomical telescopes are equipped with spectrographs, including the Hubble and Spitzer Space Telescopes.
What is made of rhenium?
Rhenium is an chemical element with atomic number 75. It is frequently used with tungsten because it adds favorable properties. It is also used for filaments in mass spectrographs.
The resolution of radio telescopes has been improved by what spectrographs charge-coupled devices photometers or interferometers?
interferometers because charge-coupled devices are only used in optical telescopes
How do scientists use spectrographs?
They analyze the spectrum of a star's light and the black lines in the spectrum indicate different elements in the stars atmosphere. The same process can be used on planets and moons.
Astronomers can learn about bodies in space by studying the patterns formed from?
the light rays that are 'bent'[refracted] as they pass through a prism, and then focused upon the receiving 'tray' that contains the film that is processed to form Spectrographs. Spectrographs are of two types: emission - spectral lines that result from the emission of photons at absolutely specific spectral lines [wavelengths], and - absorption spectral lines that are missing due to the absorbent nature of the interstellar gas & matter clouds that the Source Light passes through.
What has the author John Stanley Plaskett written?
John Stanley Plaskett has written: 'The Ottawa spectrographs' 'The dimensions and structure of the galaxy' 'The 72-inch reflecting telescope' 'The solar union' 'Notes on the spectrum of Nova Aquilae No. 3' 'The sidereal universe' 'A great reflector for Canada' 'Camera objectives for spectrographs' 'Third list of spectroscopic binaries' 'The character of the star image in spectrographic work' 'An interesting double' 'The spectroscopic binary [beta] orionis' 'Slit width and errors of measurement in radial velocity determinations'
Is energy emitted or absorbed when an electron moves from an excited state to a ground state?
Emitted, and the precise amount of energy that is emitted will depend on what kind of atom, and moving from which excited state. That's how spectrographs can determine what element is present.
Spectrographs help astronomers determine a star's what?
The star's chemical composition; the star's rotation; pulsations of the star; planets or other invisible objects moving around the star; how quickly the star is moving towards us or away from us.
