Of optics, magnetism, electricity, & galvanismM. Carey, 1815 |
From inside the book
Արդյունքներ 53–ի 1-ից 5-ը:
Էջ 24
... stand in front of the looking - glass . You see yourselves , and one another also ; for the rays of light flow from you to the glass , and are reflected back again in the same lines . Now both of you stand on one side of the room . What ...
... stand in front of the looking - glass . You see yourselves , and one another also ; for the rays of light flow from you to the glass , and are reflected back again in the same lines . Now both of you stand on one side of the room . What ...
Էջ 25
... stand at C , the rays flow from me to the glass , and are reflected back in the same line , because now there is no angle of incidence , and of course no angle of reflection ; but if I stand at x , then the rays flow from me C VOL . III ...
... stand at C , the rays flow from me to the glass , and are reflected back in the same line , because now there is no angle of incidence , and of course no angle of reflection ; but if I stand at x , then the rays flow from me C VOL . III ...
Էջ 26
... stand at y , he will see me at x , and I stand- ing at x , shall see him at y . CONVERSATION III . Of the Refraction of Light . CHARLES 55 OPTICS : 26.
... stand at y , he will see me at x , and I stand- ing at x , shall see him at y . CONVERSATION III . Of the Refraction of Light . CHARLES 55 OPTICS : 26.
Էջ 28
... stand from it in the front . Whatever suffers the rays of light to pass through it , is called a medium . Glass , which is transparent , is a inedium ; so also is air , water , and indeed all fluids that are transparent are called media ...
... stand from it in the front . Whatever suffers the rays of light to pass through it , is called a medium . Glass , which is transparent , is a inedium ; so also is air , water , and indeed all fluids that are transparent are called media ...
Էջ 30
... its place , while I pour in some water . Stand back till you just lose sight of the shilling . James . The side of the pan now com- pletely hides the sight of the money from me . Tutor . I will pour in a pitcher of clear 30 OPTICS .
... its place , while I pour in some water . Stand back till you just lose sight of the shilling . James . The side of the pan now com- pletely hides the sight of the money from me . Tutor . I will pour in a pitcher of clear 30 OPTICS .
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Common terms and phrases
acid angle animals appear attract aurora borealis ball battery body brass bring called candle chain charge Charles colours concave lens concave mirror conducting substance conductor CONVERSATION convex lens copper cylinder diameter discharge diverge ductor earth effect elec electric fluid electrified electrometer excited experiment eye-glass fixed focal distance focus Galvanism glass tube gold gymnotus hand hold humours inches insulated inverted iron James knob knuckle Leyden jar looking-glass magnet magnifying means metals motion natural share needle negative nerve nitric acid object object-glass oxidation paper pass phial piece of silver piece of zinc pith-balls Plate VIII poles position produced quantity rays of light reflected Refracting telescopes refraction repel retina rubber rubbing seen shock side south pole spark stand surface telescope tin foil tion touch tric fluid tricity Tutor Voltaism wire zinc
Սիրված հատվածներ
Էջ 54 - Thus with the year Seasons return ; but not to me returns Day, or the sweet approach of even or morn, Or sight of vernal bloom, or summer's rose, Or flocks, or herds, or human face divine ; But cloud instead, and everduring dark Surrounds me, from the cheerful ways of men Cut off, and for the book of knowledge fair Presented with a universal blank Of nature's works, to me expunged and rased, And wisdom at one entrance quite shut out.
Էջ 121 - Meantime, refracted from yon eastern cloud, Bestriding earth, the grand ethereal bow Shoots up immense; and every hue unfolds, In fair proportion, running from the red To where the violet fades into the sky.
Էջ 77 - Since c 6 is perpendicular to the glass at *), the angle of incidence is abc ; and as the angle of reflection is always equal to the angle of incidence...
Էջ 11 - How distant some of these nocturnal suns ! So distant (says the sage) 'twere not absurd To doubt if beams, set out at Nature's birth, Are yet arrived at this so foreign world, Though nothing half so rapid as their flight.
Էջ 33 - A lens is glass ground into such a form, as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names.
Էջ 287 - As he was sitting with a friend in the open air, an hour after sun-set, they saw a falling, or as it is sometimes called, a shooting star, directing its course towards them, growing apparently larger and larger, till it disappeared not far from them, and, disappearing, it left their faces, hands, and clothes, with the earth, and neighbouring objects, suddenly illuminated with a diffused and lambent light, attended with no noise at all.
Էջ 129 - Yes ; the three glasses next the eye having their focal distances equal, the magnifying power is found by dividing the focal distance of the object-glass by the focal distance of one of the eye-glasses.
Էջ 58 - First the flaming red Sprung vivid forth; the tawny orange next; And next delicious yellow; by whose side Fell the kind beams of all-refreshing green. Then the pure blue, that swells autumnal skies, Ethereal...
Էջ 291 - Even in the depth of polar night, they find A wondrous day; enough to light the chase, Or guide their daring steps to Finland fairs.
Էջ 121 - Shoots up immense ; and every hue unfolds, In fair proportion running from the red, To where the violet fades into the sky. Here, awful Newton, the dissolving clouds Form, fronting on the sun, thy showery...