Results 241 to 250 of about 3,555,650 (291)

Resonant scattering of monochromatic light in gases

IEEE Journal of Quantum Electronics, 1968
The frequency dependence of the differential cross section characterizing the resonant scattering of photons by the atoms of a dilute gas has been investigated. It is supposed that the scatterers are sufficiently dispersed so that interference between different scatterers may be neglected.
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A monochromatic light system for the analytical ultracentrifuge

Analytical Biochemistry, 1967
Abstract A monochromatic light system employing a xenon-mercury light source and a Schoeffel quartz prism monochromator is described for the absorption system of the Spinco analytical ultracentrifuge. By using conventional photographic techniques, the system may be employed from 235 to 700 mμ. Applications of the system are illustrated and discussed.
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Light‐Induced Melatonin Suppression in Humans with Polychromatic and Monochromatic Light

Chronobiology International, 2007
The relative contribution of rods, cones, and melanopsin to non-image-forming (NIF) responses under light conditions differing in irradiance, duration, and spectral composition remains to be determined in humans. NIF responses to a polychromatic light source may be very different to that predicted from the published human action spectra data, which ...
Revell, VL, Skene, DJ
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Light Source for Monochromatic Ophthalmoscopy and Fluorescein Angiography

Archives of Ophthalmology, 1979
• A light source for fiberoptic ophthalmoscopes provides seven different spectral illuminations for monochromatic ophthalmoscopy. The unit can also be used for fluorescein angioscopy.
F C, Delori, E S, Gragoudas
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How monochromatic is laser light?

American Journal of Physics, 1979
Two derivations of the fundamental laser linewidth are presented that have been used successfully in introductory courses. The cause of the finite linewidth is identified with phase fluctuations in the electric field due to spontaneous emission. A factor of 2 discrepancy between the energy and field analyses is explained.
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Pulse correction to monochromatic light-beam propagation

Optics Letters, 2001
The problem of diffraction of few-cycle light pulses is solved by means of a perturbative technique. The propagated field is expressed as a series of correction terms to the field obtained from diffraction laws for many-cycle pulses. The features previously reported for diffraction of ultrashort pulses are reproduced by first- and second-order ...
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Comment on “Degree of paraxiality for monochromatic light beams”

Optics Letters, 2008
This Comment shows that the parameter called the degree of paraxiality of a monochromatic beam [Opt. Lett.33, 1360 (2008)] was derived using misleading criteria and that the results in that Letter might lack physical meaning.
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A FAST, ACCURATE MONOCHROMATIC LIGHT STIMULUS GENERATOR

Optometry and Vision Science, 1972
ABSTRACT The light emitting diode, in conjunction with a feedback control circuit, can be used as a light stimulus generator characterized by good speed. small size, and minimal power supply equipments.
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Saturation of intermittent monochromatic lights

Vision Research, 1978
R, Siwoff, P L, Pease
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Correlation between intensity and phase in monochromatic light

Journal of the Optical Society of America A, 2005
Analytical expressions to describe the phase gradient of monochromatic light by means of the three-dimensional intensity distribution are derived. With these formulas it is shown that the two-dimensional phase gradient in a plane can be completely determined from noninterferometric intensity measurements if the light propagates strictly in one ...
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