Spectroscopy and spectrography are termsused to refer to the measurement of radiation intensity as a function ofwavelength and are often used to describe experimental spectroscopic methods.Spectral measurement devices are referred to as spectrometers,spectrophotometers, spectrographs or spectral analyzers.
Daily observations of color can be relatedto spectroscopy. Neon lighting is a direct application of atomic spectroscopy.Neon and other noble gases have characteristic emission frequencies (colors).Neon lamps use collision of electrons with the gas to excite these emissions.Inks, dyes and paints include chemical compounds selected for their spectralcharacteristics in order to generate specific colors and hues. A commonlyencountered molecular spectrum is that of nitrogen dioxide. Gaseous nitrogen dioxidehas a characteristic red absorption feature, and this gives air polluted withnitrogen dioxide a reddish brown color. Rayleigh scattering is a spectroscopicscattering phenomenon that accounts for the color of the sky.
Spectroscopic studies were central to thedevelopment of quantum mechanics and included Max Planck's explanation ofblackbody radiation, Albert Einstein's explanation of the photoelectric effectand Niels Bohr's explanation of atomic structure and spectra. Spectroscopy isused in physical and analytical chemistry because atoms and molecules haveunique spectra. As a result, these spectra can be used to detect, identify andquantify information about the atoms and molecules. Spectroscopy is also usedin astronomy and remote sensing on earth. Most research telescopes havespectrographs. The measured spectra are used to determine the chemicalcomposition and physical properties of astronomical objects (such as theirtemperature and velocity).
Test Point – TPO5L3
What is Spectroscopy? Well, the simplestdefinition I can give you is that Spectroscopy is the study of the interactionbetween matter and light. Now, visible light consists of different colors orwavelengths, which together make up what's called spectrum, a band of colors,like you see in a rainbow. And all substances, all forms of matter, can be distinguishedaccording to what wavelength of light they absorb and which ones they reflect.It's like, m, well, every element has, what we call, its own spectralsignature. If we can read that signature, we can identify the element. Andthat's exactly what spectroscopy does.
Now, Laser Spectroscopy, which is the focusof your assignment, works by measuring very precisely what parts of thespectrum are absorbed by different substances. And it has applications in a lotof different disciplines. And your assignment will be to choose a disciplinethat interests you, and devise an experiment.