 | School of Railway Signaling (Utica, N.Y.) - 1910 - 446 pagina’s
...focus, F. Parabolic reflectors are used in locomotive headlights and in search lights. REFRACTION 88. When a ray of light passes obliquely from one medium to another, as from air to glass, its direction is changed. This change of direction is called refraction. The... | |
 | American Society for Steel Treating - 1923 - 1028 pagina’s
...through a glass filled with water, or through a bubble or imperfection in a window pane. When a beam of light passes obliquely from one medium to another of different density, it suffers refraction. All of this beam, however, does not enter the second medium, but a portion of it... | |
 | Great Britain. His Majesty's Stationery Office - 1941 - 136 pagina’s
...beyond the field lens. It can consequently be used as a separate magnifying glass. Refractive Index. — When a ray of light passes obliquely from one medium to another of different density, the path of that ray is bent or altered in its course. The ray which enters the medium is the incident... | |
 | Louis Agassiz, Augustus Addison Gould - 1855 - 274 pagina’s
...divided into two compartments, called .he an terior and posterior chambers. The fluid which fills these chambers is a clear watery liquid, called the aqueous...will be refracted or turned out of its course more or less, according to the difference of this density, and the obliquity at which the ray strikes the surface.... | |
 | 1977 - 240 pagina’s
...system to converge or diverge light. See diopter. Refraction — The bending of light which occurs when a ray of light passes obliquely from one medium to another of different optical density. See angle of refraction and angle of deviation. Refractive index — See index of... | |
 | Franco Bulian, Jon Graystone - 2009 - 320 pagina’s
...taking positive steps to avoid ingestion, inhalation, or contact with skin or eyes. Physical properties When a ray of light passes obliquely from one medium to another, it is bent or refracted at the surface separating the two media. This occurs because light travels... | |
 | American Society for Steel Treating - 1923 - 1172 pagina’s
...through a glass filled with water, or through a bubble or imperfection in a window pane. When a beam of light passes obliquely from one medium to another of different density, it suffers refraction. All of this beam, however, does not enter the second medium, but a portion of it... | |
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This is called the vitreous humor, (h.) 77. The object of this apparatus is to receive the rays of light, which diverge from all points of bodies placed before it, and to bring them again to a point upon the retina. It is a well-known fact, that when... 
