Optics |
Contents
| 88 | |
| 90 | |
| 101 | |
| 113 | |
| 120 | |
| 123 | |
| 132 | |
| 139 | |
| 145 | |
| 151 | |
| 159 | |
| 165 | |
| 171 | |
| 182 | |
| 197 | |
| 211 | |
| 223 | |
| 226 | |
| 232 | |
| 292 | |
| 296 | |
| 302 | |
| 332 | |
| 340 | |
| 350 | |
| 363 | |
| 369 | |
| 375 | |
| 376 | |
| 381 | |
| 386 | |
| 392 | |
| 397 | |
| 402 | |
| 408 | |
| 417 | |
| 429 | |
| 431 | |
Other editions - View all
Common terms and phrases
achromatic angle of incidence angle of refraction apparent magnitude appear axes centre circular coincide colour consequently convergent power convex lens corresponding crown glass crystal diameter diminished direction disc distance distinct vision diverging double refraction effect equal extraordinary pencil extraordinary ray extreme eye glass eye piece focal length foci greater illuminated inch incident ray increased index of refraction instrument intensity lenses less luminous magnifying power manner medium microscope motion moved object glass object piece observer optic axis parallel rays pencil of rays perception perpendicular phenomena placed plane of polarisation plate position principal focus prism produced proportion radii radius reflected rays refracting power refrangibility rendered represented in fig retina right angles screen seen side solar light space spectrum spherical aberration spherical reflector suppose surface telescope tion tourmaline transmitted transparent tube undulations velocity violet visual magnitude vitreous humour waves yellow
Popular passages
Page viii - The perspicuity of the original has been retained, and chapters which had become obsolete, have been replaced by others of more modern character. The explanations throughout are studiously popular, and care has been taken to show the application of the various branches of physics to the industrial arts, and to the practical business of life.
Page 217 - 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.
Page 330 - ... distinct vision, so that the defect arises from no insensibility of the retina to rays of any particular refrangibility, nor to any colouring matter in the humours of the eye preventing certain rays from reaching the retina (as has been ingeniously supposed), but from a defect in the sensorium, by which it is rendered incapable of appreciating exactly those differences between rays on which their colour depends."1 This is essentially the phrenological doctrine.
Page 431 - In clear and precise terms, general notions of all the principal divisions of Physical Science."— British Quarterly Review. ANIMAL PHYSIOLOGY FOR SCHOOLS. By Dr. LARDNER. With 190 Illustrations. Second Edition. One Vol., 35. 6d. cloth. " Clearly written, well arranged, and excellently illustrated.
Page 296 - ... then if we allow the light of the sun, or the light of a candle, to act strongly upon the right eye, without affecting the left, which may be easily protected from its influence, the left hand strip of paper will be seen of a bright green colour, and the right hand strip of a red colour.
Page 141 - The height of the segment is the wall of insulation on the side from which the slice is taken. (The values may be obtained from a table giving the areas of segments of a unit circle for the ratio of the height of the segment to the diameter of the circle...
Page 19 - ... 646. The intensity of light which issues from a luminous point diminishes in the same proportion as the square of the distance from the luminary increases. Thus, at a distance of two feet...
Page 431 - We can cordially recommend it to all those who desire to possess a complete manual of the science and practice of astronomy.