prisms
81Prentice position — The Prentice Position is a term, from Optics and Ophthalmology. A ray of light incides on a prism at an angle of 90° to the first interface, so that the beam does not deviate at that face. All the deviation caused by the prism takes place at the… …
82Sixth nerve palsy — DiseaseDisorder infobox Name = Sixth nerve palsy ICD10 = ICD10|H|49|2|h|49 ICD9 = ICD9|378.54 ICDO = Caption = Figure showing the mode of innervation of the Recti medialis and lateralis of the eye. OMIM = MedlinePlus = eMedicineSubj = oph… …
83Prism compressor — A prism compressor is an optical device used to shorten the duration of a positively chirped ultrashort laser pulse by giving different wavelength components a different time delay. It typically consists of two prisms and a mirror. Figure 1 shows …
84Honeycomb (geometry) — In geometry, a honeycomb is a space filling or close packing of polyhedral or higher dimensional cells , so that there are no gaps. It is an example of the more general mathematical tiling or tessellation in any number of dimensions. Honeycombs… …
85Dispersive prism — Photograph of a triangular prism, dispersing light …
86Groundwater model — Groundwater models are computer models of groundwater flow systems, and are used by hydrogeologists. Groundwater models are used to simulate and predict aquifer conditions.CharacteristicsAn unambiguous definition of groundwater model is difficult …
87Wedge prism — The wedge prism is an optical element typically made of glass ground at slight angles to refract light passing through it from the smaller width side of the prism to the thicker width side of the prism. By refracting the light, the wedge prism… …
88Silicate minerals — ▪ Table Silicate minerals name colour lustre Mohs hardness specific gravity Tectosilicates (three dimensional networks) feldspar (for other examples, see feldspar) orthoclase flesh red, white to pale yellow, red, green vitreous 6–6½ 2.6… …
89Schiehallion experiment — Schiehallion s isolated position and symmetrical shape lent well to the experiment The Schiehallion experiment was an 18th century experiment to determine the mean density of the Earth. Funded by a grant from the …
90Optical overheating protection — With all solar thermal collector systems there is a potential risk that the solar collector may reach an equilibrium or stagnation temperature higher than the maximum safe operating temperature. Various measures are taken for optical overheating… …
