What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
according already angle of incidence appear axes axis become body called centre circle coincide colour common consequently continue convergent convex corresponding crystal curves dark David Brewster diameter diminished direction disc distance distinct diverging double refraction effect equal example experiments explained expressed extraordinary extreme fall focal length focus follows given glass greater hole humour illuminated impression inch increased intensity lens lenses less light limit magnifying magnitude manner means medium microscope motion moved necessary object observer optic axis ordinary parallel passing pencil perception phenomena picture piece placed plane of polarisation plate position presented principle prism proceeding produced proportion pupil rays received reflected reflector refraction rendered represented respectively retina right angles round screen seen shown side space square successively suppose surface tion transmitted transparent tube turned varied violet visible vision visual waves
Page viii - The perspicuity of the original has been retained, and chapters which had become obsolete, have been replaced by others of more modern character.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 259 - And looks around in fear and doubt. But soon, the prospect clearing, By cloudless starlight on he treads, And thinks no lamp so cheering As that light which Heaven sheds.
Page 67 - When a ray of light passes from a rarer into a denser medium, it is bent towards the perpendicular, and from a denser into a rarer from the perpendicular, which is by no means generally true.
Page 276 - ... 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 309 - All kinds of yellows and blues, except sky-blue, he could discern with great nicety. His father, his maternal uncle, one of his sisters, and her two sons, had all the same defect. A tailor at Plymouth, whose case is described by Mr.
Page 424 - He found that, in order to produce perfectly beautiful and symmetrical forms, three conditions were necessary. 1. That the reflectors should be placed at an angle, which was an even or an odd aliquot part of a circle, when the object was regular, and wholly included in the aperture ; or the even aliquot part of a circle when the object was irregular.
Page 173 - Young, — a theory which, if not founded in nature, is certainly one of the happiest fictions that the genius of man has yet invented to group together natural phenomena, as well as the most fortunate in the support it has unexpectedly received from whole classes of new phenomena, which at their first discovery seemed in irreconcileable opposition to it.
Page 182 - A A' and B B', along which the rays grazing the edge of the opaque body would have proceeded, the two systems of undulation will intersect each other and produce the phenomena of interference.