This time we are looking on the crossword puzzle clue for: See-through.
it’s A 11 letters crossword definition.
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Random information on the term “See-through”:
Brillouin scattering, named after Léon Brillouin, refers to the interaction of light with the material waves in a medium. It is mediated by the refractive index dependence on the material properties of the medium; as described in optics, the index of refraction of a transparent material changes under deformation (compression-distension or shear-skewing).
The result of the interaction between the light-wave and the carrier-deformation wave is that a fraction of the transmitted light-wave changes its momentum (thus its frequency and energy) in preferential directions, as if by diffraction caused by an oscillating 3-dimensional diffraction grating.
If the medium is a solid crystal, a macromolecular chain condensate or a viscous liquid or gas, then the low frequency atomic-chain-deformation waves within the transmitting medium (not the transmitted electro-magnetic wave) in the carrier (represented as a quasiparticle) could be for example:
From the perspective of solid state physics, Brillouin scattering is an interaction between an electromagnetic wave and one of the three above-mentioned crystalline lattice waves. The scattering is inelastic i.e. the photon may lose energy (Stokes process) and in the process create one of the three quasiparticle types (phonon, polaron, magnon) or it may gain energy (anti-Stokes process) by absorbing one of those quasiparticle types. Such a shift in photon energy, corresponding to a Brillouin shift in frequency, is equal to the energy of the released or absorbed quasiparticle. Thus, Brillouin scattering can be used to measure the energies, wavelengths and frequencies of various atomic chain oscillation types (‘quasiparticles’). To measure a Brillouin shift a commonly employed device called the Brillouin spectrometer is used, the design of which is derived from a Fabry–Pérot interferometer.
Random information on the term “Clear”:
CLEAR, the Campaign for Lead Free Air, was started in 1981 when a wealthy property developer, Godfrey Bradman, recruited the veteran campaigner and former Director of Shelter, Des Wilson to get lead-free petrol into the United Kingdom. Wilson ran the public campaign and co-opted Dr Robin Russell-Jones as the unpaid medical and scientific advisor.
In April 1983, the Royal Commission on Environmental Pollution (RCEP) published a report that confirmed the dangers of lead to children’s health, and recommended that lead should not be added to petrol. Within half an hour of the RCEP report being published, the Environment Secretary, Tom King, announced that the government would support the introduction of unleaded petrol, that oil companies would have to provide it on forecourts, and that car manufacturers would have to make engines that could use it.
Shortly after, Wilson resigned from CLEAR to become Chairman of Friends of the Earth. From 1984-89 Russell-Jones became Chair of CLEAR whom he represented on the Government committee, Working Party on Lead in Petrol (WOPLIP).