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 67
... is at a greater distance from the glass than half c c , or radius . Charles . The image is inverted also , and less than the object . CONVERSATION XII . Of Concave Mirrors , and Experiments on OF CONCAVE MIRRORS . 67.
... is at a greater distance from the glass than half c c , or radius . Charles . The image is inverted also , and less than the object . CONVERSATION XII . Of Concave Mirrors , and Experiments on OF CONCAVE MIRRORS . 67.
Page 68
... with a little care in adjust- ing your position , you will see an inverted image of yourself in the air between you and the mirror , and of a less size than you are . When you see the image , extend your hand gently 68 OPTICS .
... with a little care in adjust- ing your position , you will see an inverted image of yourself in the air between you and the mirror , and of a less size than you are . When you see the image , extend your hand gently 68 OPTICS .
Page 70
... inverted in the air , and the water which is in the lower part of the bot- tle will appear to be in the upper . - I will invert the bottle , and uncork it , and whilst the water is running out , the image will appear to be filling , but ...
... inverted in the air , and the water which is in the lower part of the bot- tle will appear to be in the upper . - I will invert the bottle , and uncork it , and whilst the water is running out , the image will appear to be filling , but ...
Page 74
... inverted ? Tutor . Certainly , because the rays have cross- ed before they reach the eye . You may see this subject in another point of view : let ry ( Plate 111. Fig . 21. ) be a concave mirror , and o the centre of concavity : divide ...
... inverted ? Tutor . Certainly , because the rays have cross- ed before they reach the eye . You may see this subject in another point of view : let ry ( Plate 111. Fig . 21. ) be a concave mirror , and o the centre of concavity : divide ...
Page 85
... inverted . Tutor . Open the window , and you will see the trees in the garden drawn upon it in the same inverted state , or any other bright object that is presented to it . Charles . Does the paper , in this instance , re- present the ...
... inverted . Tutor . Open the window , and you will see the trees in the garden drawn upon it in the same inverted state , or any other bright object that is presented to it . Charles . Does the paper , in this instance , re- present the ...
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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.