What exactly happens that such changes are caused?
elements has 208 questions, of which 41 are currently closed (a whopping 20%!). The tag was created on Oct 2'14, and has no tag usage as of yet.
This has resulted in a varied application of the tag. Of the 167 open questions, many could use alternate and well-defined tags:
this could use rare-...
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Most common spectroscopies that produce either a full spectrum, a tensor, or a scalar value have a specific instrument associated with them that is relatively self-contained and not custom. For example, (linear) IR spectra come from benchtop FT-IR spectrometers, NMR chemical shifts use a FT-NMR s...
Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive). The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with non-cubic crystal structures are often birefringent, as are plastics under mechanical stress.
Birefringence is responsible for the phenomenon of double refraction whereby a ray of light, when incident upon a birefringent material, is split...
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The Periodic Table
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