منابع مشابه
Collinear mirage effect at a microscopic scale
This demonstration of mirage effect under a microscope provides a new possibility to measure the thermal diffusivity of a transparent sample as small as a few microns, with micronic spatial resolution. Mirage effect [ l] is now a classical technique of photothermal physics. The modulated heating beam is focused at normal incidence on the sample's surface, while the probe beam runs either along ...
متن کاملAnalysis of an infrared mirage sequence.
Infrared observations of seaborne thermal sources are subject to the effects of atmospheric refraction. For low elevation angles at long ranges, out to the limit of visibility, the inevitable atmospheric temperature gradients frequently produce mirages. I present an analysis of a 22-min sequence of images recorded on 18 February 1994 at the U.S. Naval Surface Warfare Center at Wallops Island, V...
متن کاملAn X-ray diffractometer using mirage diffraction
Some characteristics are reported of a triple-crystal diffractometer with a (+, -, +) setting of Si(220) using mirage diffraction. The first crystal is flat, while the second and third crystals are bent. Basically, the first crystal is used as a collimator, the second as a monochromator and the third as the sample. The third crystal also works as an analyzer. The advantages of this diffractomet...
متن کاملThe Mirage of An Economics of Knowledge
1 Once upon a time, say around the era of David Ricardo and Karl Marx, political economy was primarily concerned with the production of national wealth. This ―classical‖ notion tended to hang on long into the 20 th century, well after the invention of neoclassical economics in the 1870s (Mirowski, 1989, chap. 7). Nevertheless, there was no denying that within neoclassical economics, exchange ha...
متن کاملMirage Cosmology
A brane universe moving in a curved higher dimensional bulk space is considered. The motion induces a cosmological evolution on the universe brane that is indistinguishable from a similar one induced by matter density on the brane. The phenomenological implications of such an idea are discussed. Various mirage energy densities are found, corresponding to dilute matter driving the cosmological e...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1980
ISSN: 0001-4966
DOI: 10.1121/1.2018377