An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 4
... give to him ideas as to the size , shape , and colour of these objects , the only action outside the eye being mo- tion , the action within the eye being the motion of the nerve , which motion and its mental result constitute light . It ...
... give to him ideas as to the size , shape , and colour of these objects , the only action outside the eye being mo- tion , the action within the eye being the motion of the nerve , which motion and its mental result constitute light . It ...
Página 5
... gives off a radiant force , and these , being arrayed in the form of a flame , act upon the eye to give a notion of a flame to the mind . But I not only see the flame ; I also see the table , chairs , books , pictures , & c . By what ...
... gives off a radiant force , and these , being arrayed in the form of a flame , act upon the eye to give a notion of a flame to the mind . But I not only see the flame ; I also see the table , chairs , books , pictures , & c . By what ...
Página 6
... gives us the idea of a human face . But whether I look straight at the man , or whether I look at him in the glass , I see him by precisely the same means — the radiation from his features of the light falling on them . If there be no ...
... gives us the idea of a human face . But whether I look straight at the man , or whether I look at him in the glass , I see him by precisely the same means — the radiation from his features of the light falling on them . If there be no ...
Página 8
... gives me light . I set in action a voltaic battery and connect with it two pieces of carbon , slightly separated , and again I produce light ( fig . 4 ) . This I can do still more brilliantly by increasing the strength of my battery ...
... gives me light . I set in action a voltaic battery and connect with it two pieces of carbon , slightly separated , and again I produce light ( fig . 4 ) . This I can do still more brilliantly by increasing the strength of my battery ...
Página 17
... gives a double sound , as does the report of a gun , or a blow with a heavy hammer . Here are two facts : One , that sounds can be heard at con- siderable distances through tubes ; another , that sounds so heard at a distance are ...
... gives a double sound , as does the report of a gun , or a blow with a heavy hammer . Here are two facts : One , that sounds can be heard at con- siderable distances through tubes ; another , that sounds so heard at a distance are ...
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Palavras e frases frequentes
absorbed acid action amount of heat angle antimony apparatus arrangement atoms attraction ball battery becomes bismuth body carbon chemical coil colour conducting conductor connection continuous copper current passes decomposed decreases density direction distance earth effect electric current electric force electrified electroscope equal ether excited galvanic galvanometer gases given glass greater hydrogen inches increase latent heat length less Leyden jar light falling light passing liquid magnet magnetised means measure medium mercury metal mirror motion move needle negative nitric acid number of vibrations ordinary oxygen parallel particles passage piece plate platinum polarised pole position prism produce quantity radiation ray of light refraction repulsion result side soft iron solid sound sound-wave spark specific heat spectrum string substance sulphuric acid surface temperature theory thickness tion tricity tube velocity velocity of sound weight whole wire zinc
Passagens conhecidas
Página 54 - ... 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.
Página 391 - A Manual of Palaeontology, for the Use of Students. With a General Introduction on the Principles of Palaeontology.
Página 292 - ... before incidence. Hence the reflected rays, on being produced back, will meet at a point as far behind the reflector as the point of the object is in front of it.