Term
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Definition
E = hν = hc/λ
where v = frequency, h = Planck's constant, λ = wavelength |
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Term
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Definition
| Superposition of 2 waves to create a wave of greater or lower aptitude |
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Term
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Definition
| The tendency of waves to "bend" around an obstacle |
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Term
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Definition
| Relative speed of light in a medium |
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Term
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Definition
mλ = 2dsinθ
where λ is wavelength,
m is the wave order,
d is the spacing between crystal planes,
and θ is the diffraction angle |
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Term
| Force on charged particle in magnetic field |
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Definition
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Term
| Force on charged particle in electric field |
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Definition
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Term
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Definition
| Electrons in a molecule are excited from one energy level to a higher energy level |
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Term
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Definition
| A transition between two quantized levels of a molecule that have different vibrational energies |
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Term
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Definition
| When the filling of an inner-shell electron vacancy is accompanied by an electron emission from the same atom |
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Term
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Definition
| When a material is exposed to an beam of ions, the excited atoms in the material emit x-ray radiation |
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Term
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Definition
| The emission of light by a material that has absorbed electromagnetic radiation. |
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Term
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Definition
| Electrons generated as ionization products |
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Term
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Definition
| Incident electrons which are scattered from material back towards the original source |
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Term
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Definition
| A source producing relatively narrow, specific wavelengths |
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Term
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Definition
| A source producing a broad, featureless range of wavelengths |
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Term
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Definition
| Generates an "electrically neutral medium of positive and negative ionization charges" (plasma) |
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Term
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Definition
| Radiation emitted by a non-reflective material held at a constant, uniform temperature |
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Term
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Definition
| In light-amplified stimulated emission of radiation, population inversion occurs - most atoms are in the excited state |
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Term
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Definition
When high energy charged particles
(e.g., electrons) are traveling in a
circular orbit at a relativistic speed
, they emit electromagnetic radiation
tangential to the orbit |
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Term
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Definition
| Remove specific wavelengths |
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Term
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Definition
| Select specific wavelengths |
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Term
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Definition
| A device that selects a narrow band of wavelengths from a wider range of input wavelengths |
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Term
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Definition
| No current when there is no light; when light is incident on it, it produces electrons & holes in the depletion layer and induces a current proportional to the radiant power |
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Term
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Definition
| An image is constructed from the pattern of incident electric charge |
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Term
| Photomultiplier Tubes (PMTs) |
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Definition
| High sensitivity light detector that can increase incident current by up to 100 times through mutiple dynode stages |
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Term
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Definition
| Vacuum-tube detector that multiplies incident charges through secondary emission |
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Term
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Definition
| Using charge multiplication through secondary emission, multichannel plates are arrays of electron multipliers which also provide spatial information of incident charge |
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