Of optics, magnetism, electricity and galvanismH.C. Carey & I. Lea, M'Carty & Davis, Kimber & Sharpless, Lydia R. Bailey, Benjamin & Thomas Kite, Bennett & Walton, Marot & Walter, and Anthony Finley, 1825 |
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Page 20
... ( Plate 1. Fig . 1. ) represent the looking - glass : if I 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 ...
... ( Plate 1. Fig . 1. ) represent the looking - glass : if I 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 ...
Page 21
... their former course , and this is called refraction . James . Can you explain this term more clearly ? Tutor . Suppose A B ( Plate 1. Fig . 2. ) to be a piece of glass , two or three inches thick THE REFRACTION OF LIGHT . 21.
... their former course , and this is called refraction . James . Can you explain this term more clearly ? Tutor . Suppose A B ( Plate 1. Fig . 2. ) to be a piece of glass , two or three inches thick THE REFRACTION OF LIGHT . 21.
Page 25
... ( Plate 1. Fig . 3. ) into a dark room , having only a very small hole in the window shutter : so place the basin that a ray of light s s shall fall upon the bottom of it at a , here I make a small mark , and then fill the basin with ...
... ( Plate 1. Fig . 3. ) into a dark room , having only a very small hole in the window shutter : so place the basin that a ray of light s s shall fall upon the bottom of it at a , here I make a small mark , and then fill the basin with ...
Page 27
... ( Plate 1. Fig . 4. ) represent water , and max the oar , the image of the part a x in the water will lie above the object , so that the oar will appear in the shape man , instead of m a x . On this account also , a fish in the water ...
... ( Plate 1. Fig . 4. ) represent water , and max the oar , the image of the part a x in the water will lie above the object , so that the oar will appear in the shape man , instead of m a x . On this account also , a fish in the water ...
Page 28
... experiment which depends on refraction : here is a glass goblet two - thirds full of water ; I throw into it a shil- ling , and place a plate on the top of it , and turn it quickly over , that the water may not escape 28 OPTICS .
... experiment which depends on refraction : here is a glass goblet two - thirds full of water ; I throw into it a shil- ling , and place a plate on the top of it , and turn it quickly over , that the water may not escape 28 OPTICS .
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Common terms and phrases
angle angle of incidence appear attract aurora borealis ball battery body brass called candle chain charge Charles coat colours concave mirror conductor CONVERSATION convex lens cylinder dark diameter direction discharge discharging-rod diverge double convex ductor earth elec electric fluid electrified electrometer equal excited experiment eye-glass figure fixed focal distance focus formed glass tube hand hole humours inches incident ray insulated inverted iron James knob Leyden jar looking-glass machine magnet magnified means metals move natural share needle nitric acid nosegay object object-glass oxidated paper parallel rays particles pass phial piece pith-balls placed Plate VII poles proceed produced quantity radius rays flow rays of light reflected rays reflecting telescope reflector refraction repel retina seen shock side silver spark spherical reflector stand Suppose surface telescope tin foil touch tricity Tutor vitreous humour Voltaic wire zinc
Popular passages
Page 155 - Leyden, of much eminence, said that " he felt himself struck in his arms, shoulders, and breast, so that he lost his breath ; and it was two days before he recovered from the effects of the blow and the terror ; adding, that he would not take a second shock for the kingdom of France.
Page 28 - Thus with the year Seasons return ; but not to me returns Day, or the sweet approach of ev'n or morn, Or sight of vernal bloom, or summer's rose, Or flocks, or herds, or human face divine ; HIS MANLY BEAUTY.
Page 28 - 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 ever-during 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.
Page 30 - Filled overflowing all those lamps of Heaven, That beam for ever through the boundless sky ; But, should he hide his face, the astonished sun, And all the extinguished stars, would loosening reel Wide from their spheres, and Chaos come again.
Page 31 - 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...
Page 76 - 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.
Page 5 - This will lead us to the explanation of one of the principal definitions in optics, viz. that the angle of reflection is always equal to the angle of incidence.
Page 39 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Page 75 - 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.
Page 75 - IK ; opposite to the hole r is a small mirror L, concave towards the great one ; it is fixed on a strong wire M, and may, by means of a long screw on the outside of the tube, be made to move backwards or forwards. AB is a remote object ; from which rays will flow to the great mirror D F.