 | Sir Richard Glazebrook - 1894 - 236 páginas
...is called the refractive index of the medium. Tofind the refractive index, then, we require to know the ratio of the sine of the angle of incidence to the sine of the angle of refraction. If the medium from which the light is incident be air, then for all transparent bodies... | |
 | Charles Kendall Adams - 1895 - 984 páginas
...of either ray in a double refracting medium, see POLARIZATION. Index of Refraction. — The constant ratio of the sine of the angle of incidence to the sine of the angle of refraction when a ray of homogeneous light passes through the bounding surface between two media. Thus if a ray of monochromatic... | |
 | George Neil Stewart - 1895 - 842 páginas
...the two media. For purposes of comparison, the refractive index of a substance is usually taken as the ratio of the sine of the angle of incidence to the sine of the angle of refraction of a ray passing from air into the substance. When a ray strikes a surface at right angles,... | |
 | S. P. Meads - 1896 - 298 páginas
...incidence. Measure CE the sine of the angle of refraction. Divide DA by CE. The index of refraction is the ratio of the sine of the angle of incidence to the sine of the angle of refraction. This is constant for any two substances, whatever be the angle of incidence. The index... | |
 | Charles Herbert Clark - 1896 - 296 páginas
...increases, it has been found by experimental demonstration that, as long as the two media remain the same, the ratio of the sine of the angle of incidence to the sine of the angle of refraction This ratio -=T=- is called the Index of Refracis constant. PR tion. It is usually expressed... | |
 | Edward Leamington Nichols - 1897 - 476 páginas
...is said to be refracted. The law of its change of direction follows a fixed law; viz.: 343. THE LAW OF REFRACTION. — The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. The law may be expressed thus, sin i —— = n. sin r The quantity n in the... | |
 | Edward Leamington Nichols - 1897 - 512 páginas
...said to be refracted. The law of its change of direction follows a fixed law ; viz. : 343. THE LAW OP REFRACTION. — The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. The law may be expressed thus, sin i — — = n. smr The quantity n in the... | |
 | Nathaniel L. Macbride - 1897 - 320 páginas
...remembered that Snell's law is only applicable to homogeneous substances. The number which expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction is called the Index of Refraction. This is, in the case of air and glass, f, or, as it is... | |
 | Joseph Sweetman Ames - 1897 - 548 páginas
...refracted wave-fronts and to the plane surface all lie in one plane, viz. the plane of incidence. 2. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for a given form of matter and waves of a definite wave-number; it is entirely... | |
 | Jabez Hogg - 1898 - 780 páginas
...refracted, remain the same, and the light also of the same kind, then it is referred to as the law of sines. Indices of Refraction. The ratio of the sine of the...the angle of refraction, when a ray passes from one medinm to another is termed the relative index of refraction. When a ray passes from vacunm into any... | |
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When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media. 
