Lessons in elementary physics1884 |
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Σελίδα 135
... mirror , the sound which diverges from it will be reflected as in the figure , until it ultimately comes to a point at the focus ƒ of the other mirror . Thus , if a watch be placed at the one focus , its ticking will be heard very ...
... mirror , the sound which diverges from it will be reflected as in the figure , until it ultimately comes to a point at the focus ƒ of the other mirror . Thus , if a watch be placed at the one focus , its ticking will be heard very ...
Σελίδα 155
... mirror attached to one arm , and a small counterpoise , in order to balance the mirror , to the other . A ray of light from a hole in a darkened chimney of a lamp is made to strike this mirror , and is reflected from it towards another ...
... mirror attached to one arm , and a small counterpoise , in order to balance the mirror , to the other . A ray of light from a hole in a darkened chimney of a lamp is made to strike this mirror , and is reflected from it towards another ...
Σελίδα 156
Balfour Stewart. screen ; but if it has been put into vibration , the mirror will of course , move along with it , and the result will be that the luminous dot of light will oscillate on the screen up and down with each vibration of the ...
Balfour Stewart. screen ; but if it has been put into vibration , the mirror will of course , move along with it , and the result will be that the luminous dot of light will oscillate on the screen up and down with each vibration of the ...
Σελίδα 232
... mirror . The truth of this law may be rendered visible to the eye by allowing a beam from the sun , or from an electric lamp , to fall upon a mirror in an otherwise dark room . The path of the ray , both before and after reflexion ...
... mirror . The truth of this law may be rendered visible to the eye by allowing a beam from the sun , or from an electric lamp , to fall upon a mirror in an otherwise dark room . The path of the ray , both before and after reflexion ...
Σελίδα 233
... mirror . Then let A B C D ( Fig . 72 ) be an irregular body , of which we wish to study the reflexion in the mirror M. From the various points of the body A B C D drop perpendiculars upon the plane of the mirror , and continue them on ...
... mirror . Then let A B C D ( Fig . 72 ) be an irregular body , of which we wish to study the reflexion in the mirror M. From the various points of the body A B C D drop perpendiculars upon the plane of the mirror , and continue them on ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
49 metres 98 metres action actual energy angle annealed applied atmosphere attraction ball beam carbonic acid carriage centre of gravity chemical affinity column compression cubic cubic centimetre cylinder denote density displacement distance double earth electricity energy of position equilibrium experiments fact fall fluid focus force of gravity force tending friction gases glass grammes hence increase instance kilogrammes latent heat law of motion length let us suppose liquid luminous mass means mercury metres per second miles mirror molecular momentum moving force oscillation particles pendulum piston plane plate pressure produce proportional ray of light represent resistance rest side solid sound space passed specific gravity specific heat square centimetre steam stone string substance temperature thermometer tube unit upwards vapour various velocity of 98 vertical vessel vibration visible energy visible motion volume wave wave-length weight whole zinc
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