What is the purpose of a spectometer?

Answer 1

A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum. The variable measured is most often the light's intensity but could also, for instance, be the polarization state. The independent variable is usually the wavelength of the light, normally expressed as some fraction of a meter, but sometimes expressed as some unit directly proportional to the photon energy, such as wavenumber or electron volts, which has a reciprocal relationship to wavelength. A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared.

Answer 2

The experiment models the emission of photons by a lamp, the absorption of those photons by a solute in a sample solution, and the detection of the photons by a photomultiplier tube. The photons are represented by little balls (a particulate matter model rather than a wave model). The simulation permits the simultaneous use of two different wavelengths.

The user may specify several operating conditions for the spectrophotometer.

Sample
Blank
The molar absorptivity is zero for both wavelengths.
Unknown 1
The wavelength and molar absorptivity are selected by the applet (the molar absorptivity is not shown to the user). The second wavelength is not used.
Unknown 2
Same as Unknown 1
User Entered
The user may specify both wavelengths and both molar absorptivities
Wavelength
The wavelength of the photon in nanometers may be specified. The color of the "photon" is selected to loosely correspond with the wavelength.
Molar Absorptivity (L mole-1 cm-1)
Concentration (millimole L-1)
Cell Path Length (cm)
Intensity (photons/sec)
The intensity is the number of photons per second emitted from the source.
To use the applet

Select the desired sample.
Start the simulation by clicking on the green button in the lower right corner of the applet.
The intensity of photons reaching the detector may be measured using the timer in the lower left corner of the applet.
Operational Notes and Tips

The first wavelength and molar absorptivity (left-most boxes) are always active. The wavelength must always lie in the range of 380 to 780 nm. The second wavelength can be disabled by entering a wavelength of 0.
When measuring an intensity after changing the operating conditions (e.g., concentration, cell path length, source intensity, or molar absorptivity), all sufficient time for the existing photons to cross the screen before starting or reseting the time.
On slow computers the animation of the photons can become jerky and photons may be released from the lamp in waves rather than randomly; this behavior can be especially pronounced when two different wavelengths and a high intensity of photons are used. These problems can be compounded by an operating system such as Windows 95 that is sluggish in switching tasks. To remedy or alleviate this problem, try
Operating the simulation with a lower intensity
Closing all other applications, thereby freeing more CPU time for the simulation.
Reboot the system (especially for Windows 95/98) to eliminate all unnecessary background processes.

Answer 3

A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum. The variable measured is most often the light's intensity but could also, for instance, be the polarization state. The independent variable is usually the wavelength of the light, normally expressed as some fraction of a meter, but sometimes expressed as some unit directly proportional to the photon energy, such as wave number or electron volts, which has a reciprocal relationship to wavelength. A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared.

Answer 4

A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum. The variable measured is most often the light's intensity but could also, for instance, be the polarization state. The independent variable is usually the wavelength of the light, normally expressed as some fraction of a meter, but sometimes expressed as some unit directly proportional to the photon energy, such as wavenumber or electron volts, which has a reciprocal relationship to wavelength. A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared.

Answer 5

There are many types of spectrometers but the basic purpose is to take an input signal and spread it out so you can see what makes up that signal. In chemistry, I assume it is an optical spectrometer where light from something is broken down into its wavelengths (colors). Various substances burning, for example, wil give off a fingerprint spectrum helping to identify that substance.

A spectrometer is used to study light from stars to help identify the chemical makeup of the outer atmosphere. In fact, the element helium was discovered on the sun this way, by its characteristic spectrum, before it was discovered here on earth.

Answer 6

That is too a generalised questions. What kind of spectrometer, where are many kinds.

A spectrometer in general measures the wavelength of a compound then energy of a set wavelength is directed at it.
This can results in energy being absorbed and then given off at another wavelength, or its power is reduced. From the data given off and through computer methods you can find some information about the sample which may help identy it or some part of the compound.

Answer 7

Do you mean "spectrometer"?

"A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum."

Answer 8

Don't you love the way some people have the courtesy of citing where they copied and pasted their information from? Then there are others who copied and pasted the EXACT same paragraph with no citing, as if it were their own.

Answer 9

it measures absorbance of a material-normally liquid. light is shined on it and what is transmitted through it is measured, and converted to absorbance units. it can tell you all sorts about the compound from what type of inhibitor it is, or help you identify what it is.

Answer 10

it spectomizes