 | Thomas Keith - 1826 - 360 pages
...which is not affected by refraction. M It has long been established, by experiment, that a ray oflight passing from a rarer to a denser medium, is refracted towards the denser medium. Thus, if ABC he the boundary between two media, of which the lower one is the denser,... | |
 | Richard Green Parker - 1842 - 278 pages
...according to the laws stated in No. 593, light, in passing from a rarer to a denser medium, is reJracled towards the perpendicular; and, on the contrary, that...perpendicular. In order to estimate the effect of a lent, we must consider the situation of the perpendicular, with respect to the surface of the lens.... | |
 | James Dwight Dana - 1844 - 652 pages
...it had proceeded in the original direction DE. We have therefore this important principle : Light, in passing from a rarer to a denser medium, is refracted TOWARDS the perpendicular ; if from a denser to a rarer, it is refracted FROM the perpendicular. It has been proved by experiment,... | |
 | Thomas Keith - 1848 - 486 pages
...which is not affected by refraction. It has long been established, by experiment, that a ray of light passing from a rarer to a denser medium, is refracted towards the denser medium. Thus, if ABC be the boundary between two media, of which the lower one is the denser,... | |
 | Richard Green Parker - 1849 - 418 pages
...represents the axis of ail the five lenses? It will be remembered that, according to these laws, light, in passing from a rarer to a denser medium is refracted...contrary, that in passing from a denser to a rarer medium, it is refracted further from the perpendicular. In order to estimate the effect of a lens, we must... | |
 | Richard Green Parker - 1850 - 408 pages
...represents the axis of all the five lenses? It will be remembered that, according to these laws, light, in passing from a rarer to a denser medium is refracted...contrary, that in passing from a denser to a rarer medium, it is refracted further from the perpendicular. In order to estimate the effect of a lens, we must... | |
 | James Dwight Dana - 1850 - 800 pages
...it had proceeded in the original direction DE. We have therefore this important . principle : Light, in passing from a rarer to a denser medium, is refracted TOWARDS the perpendicular ; if from a denser to a rarer, it is refracted FROM the perpendicular. It has been proved by experiment,... | |
 | Richard Green Parker - 1852 - 620 pages
...according to these laws, light, in passing from a rarer to a denser medinm is refracted to-, wards the perpendicular; and, on the contrary, that in passing from a denser to a rarer medinm, it is refracted further from the perpendicular. In order to estimate the effect of a lens,... | |
 | Richard Green Parker - 1855 - 416 pages
...course according to the laws of Dioptrics. It will be remembered that, according to these laws, light, in passing from a rarer to a denser medium, is refracted...towards the perpendicular ; and, on the contrary, that iu passing from a denser to a rarer medium it is refracted further from the perpendicular. In order... | |
 | Richard Green Parker - 1856 - 502 pages
...course according to the laws of Dioptrics. It will be remembered that, according to these laws, light, in passing from a rarer to a denser medium, is refracted...contrary, that in passing from a denser to a rarer medium it is refracted further How must we f th perpendicular. In order to estimate estimate the ef- ' ' feet... | |
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In order to estimate the effect of a lens, we must consider the situation of the perpendicular, with respect to the surface of the lens. Now, a perpendicular, to any convex or concave surface, must always... 
