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A blucher (/ ˈ b l uː tʃ ər / or / ˈ b l uː k ər /, German pronunciation:, Blücher) is a style of shoe with open lacing, its vamp made of a single piece of leather ("one cut"), with shoelace eyelets tabs sewn on top. [1] The blucher is similar to a derby since both feature open lacing, in contrast to the Oxford shoe, which uses closed ...
If when the quantity of light i polarized in the plane a 1 proceeds from 1 in the direction of the given ray, that part k thereof of light polarized in a 2 arrives at 2, then, conversely, if the quantity of light i polarized in a 2 proceeds from 2, the same quantity of light k polarized in a 1 [Kirchhoff's published text here corrected by ...
Oxford shoes are also known for their variation or style. The Cap-Toe Oxford is the most well-known, although 'Whole Cut', 'Plain Toe', and a variation of 'Brogue' Oxfords are commonly referred to styles. [5] Shoes with closed lacing (Oxfords/Balmorals) are considered more formal than those with open lacing (Bluchers/Derbys). [6]
Reflection of light is either specular (mirror-like) or diffuse (retaining the energy, but losing the image) depending on the nature of the interface.In specular reflection the phase of the reflected waves depends on the choice of the origin of coordinates, but the relative phase between s and p (TE and TM) polarizations is fixed by the properties of the media and of the interface between them.
White bucks", or light-colored suede or buckskin (or nubuck) derby shoes, usually with a red sole, were long popular among the students and graduates of Ivy League colleges. [4] By translation, these shoes also became associated with elite law firms in cities of the Eastern United States , especially New York and Boston , giving rise to the ...
Light waves change phase by 180° when they reflect from the surface of a medium with higher refractive index than that of the medium in which they are travelling. [1] A light wave travelling in air that is reflected by a glass barrier will undergo a 180° phase change, while light travelling in glass will not undergo a phase change if it is reflected by a boundary with air.
Specular reflection, or regular reflection, is the mirror-like reflection of waves, such as light, from a surface. [ 1 ] The law of reflection states that a reflected ray of light emerges from the reflecting surface at the same angle to the surface normal as the incident ray, but on the opposing side of the surface normal in the plane formed by ...
In photography, reciprocity refers to the relationship whereby the total light energy – proportional to the total exposure, the product of the light intensity and exposure time, controlled by aperture and shutter speed, respectively – determines the effect of the light on the film. That is, an increase of brightness by a certain factor is ...