Results 11 to 20 of about 15,887,789 (404)
arXiv, 2011 For a long time, it is believed that the light by light scattering is described properly by the Lagrangian density obtained by Heisenberg and Euler. Here, we present a new calculation which is based on the modern field theory technique. It is found that the light-light scattering is completely different from the old expression.
arxiv +3 more sources
Controlling Light Harvesting with Light [PDF]
Journal of the American Chemical Society, 2016 When exposed to intense sunlight, all organisms performing oxygenic photosynthesis implement various photoprotective strategies to prevent potentially lethal photodamage. The rapidly responding photoprotective mechanisms, occurring in the light-harvesting pigment-protein antennae, take effect within tens of seconds, while the dramatic and potentially ...
Tjaart P. J. Krüger +6 more
openaire +6 more sources
, 2012 The gravitational interaction of light is analyzed considering its dual characteristic nature, i.e., as an (electromagnetic) wave or as a particle (photon). Considered as an electromagnetic wave, the light can be source of gravitational waves belonging to the larger class of exact solutions of Einstein field equations which are invariant for a non ...
VILASI, SILVIA +3 more
openaire +5 more sources
Light-Emitting Diodes in the Solid-State Lighting Systems [PDF]
International Journal of Sciences, 2014, Volume 3, Issue 11, pages
9-17, 2014 Red and green light-emitting diodes (LEDs) had been produced for several decades before blue emitting diodes, suitable for lighting applications, were widely available. Today, we have the possibility of combining the three fundamental colours to have a bright white light. And therefore, a new form of lighting, the solid-state lighting, has now become a
arxiv +1 more source
Contrefaire l’art ou contrefaire la nature : l’analogie artistique pour la restauration écologique
Cybergeo, 2009 Andrew Light examines the debates on restoration ecology between Robert Elliot and Eric Katz. Rather than taking on their strong metaphysical distinction between nature and culture, as some critics do, he assumes it is true and then argues that it does ...
Andrew Light
doaj +1 more source
Light-matter quantum dynamics of complex laser-driven systems [PDF]
J. Chem. Phys. 154, 234106 (2021), 2021 We propose a novel general approximation to transform and simplify the description of a complex fully-quantized system describing the interacting light and matter. The method has some similarities to the time-dependent Born-Oppenheimer approach: we consider a quantum description of light rather than of nuclei and follow a similar separation procedure ...
arxiv +1 more source
Impact of mechanical disturbances to the placement of reference light in Fourier transform interferometers [PDF]
Rev. Sci. Instrum. 1 November 2024, 95 (11): 113706, 2023 Fourier transform interferometers usually need a dedicated reference light to precisely track optical path difference changes. There are a few different ways to incorporate the reference light into the optical system. This paper conducted experiments to give a test of how different ways of incorporating reference light are affected by mechanical ...
arxiv +1 more source
Case Reports in Neurology, 2022 The longer term neurocognitive/neuropsychiatric consequences of moderate/severe COVID-19 infection have not been explored. The case herein illustrates a complex web of differential diagnosis.
Sharee N. Light
doaj +1 more source
Absorption and Scattering of Light by Small Particles
, 1998 BASIC THEORY. Electromagnetic Theory. Absorption and Scattering by an Arbitrary Particle. Absorption and Scattering by a Sphere. Particles Small Compared with the Wavelength. Rayleigh--Gans Theory. Geometrical Optics. A Potpourri of Particles.
C. Bohren, D. Huffman
semanticscholar +1 more source