Opacity (optics) - Factbites
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Topic: Opacity (optics)


    Note: these results are not from the primary (high quality) database.


In the News (Thu 31 Dec 09)

  
 rmsc19_HTOC
Off-axis Point Spread Function and Efficiency for Adaptive Optics at San Pedro Mártir and other sites
Eight Years of Millimetric Atmospheric Opacity Measurements at San Pedro Mártir Sierra in Baja California
Wavefront outer scale measurements at San Pedro Mártir Observatory.
www.astroscu.unam.mx /rmaa/RMxAC..19

  
 KF42: Faststofkemi 1
Transparency, opacity, refraction, double refraction, reflection, fibre optics, birefringence, colour, iridescence, pleochroism, photochromic compounds, tenebrescence, alexandrite effect, polaroid, luminescence, the ruby laser, up-conversion.
An introduction to various optical phenomena, with an emphasis on definitions and examples of materials which exhibit these effects.
An introduction to various electronically conducting materials, with emphasis on definitions and examples of materials which exhibit these effects.
www.sdu.dk /Nat/Chem/educ/courses/KF42_X.HTML

  
 Research Faculty: Aephraim M. Steinberg
Electromagnetically induced opacity for photon pairs, K.J. Resch, J.S. Lundeen, and A.M. Steinberg, J. Mod.
Amplification of Superluminality,presentation at ITP Mini-Workshop on Quantum Optics (2002) by A.M. Steinberg.
On energy transfer by detection of a tunneling atom, A. Steinberg, Journal of the Korean Physical Society 35 (3), 122 (1999).
www.physics.utoronto.ca /~aephraim/aephraim.html   (2500 words)

  
 UnISIS Excimer Laser System
Excimer lasers also work at shorter wavelengths (308 nm, 248 nm, 157 nm) if loaded with other gas mixtures, but these are of little interest for laser guide star work because the high opacity of the Earth's atmosphere at the shorter wavelengths limits the height to which the laser light can penetrate.
The output laser beam emerges from the far side of the laser cabinet, reflects off a set of beam-steering mirrors, and eventually is sent through a portal in the ceiling to the beam combining optics that are located in the Coude Room some 10 meters overhead.
The laser light is generated at 351 nm (the middle of the standard photometric U-band) when an electrical discharge occurs between a pair of electrodes which are suspended in a pressurized chamber of gas.
www.astro.uiuc.edu /~thompson/laser1A.html   (1246 words)

  
 T-4 at Los Alamos National Laboratory
T-4 members develop methods for and do computer calculations of atomic structure, scattering cross sections, opacities, exotic atoms, quantum and nonlinear optics, and Bose-Einstein condensates/Fermi-degenerate gases.
Los Alamos Opacity Verification & Validation Workshop (Los Alamos, May 3-5, 2005)
Los Alamos, New Mexico 87545, U.S.A. 1-505-667-5751 (voice)
www.t4.lanl.gov   (303 words)

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