An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 8
... produce light . I stand in the sun , and it 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 ...
... produce light . I stand in the sun , and it 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 ...
Página 20
... produces a spectrum , only the middle portion of which is visible to our eyes . ( 4. ) Form of Sound - Waves ... produce a compres- sion there , and a consequent action upon the space ( 3 ) . In this way each shell of air will be ...
... produces a spectrum , only the middle portion of which is visible to our eyes . ( 4. ) Form of Sound - Waves ... produce a compres- sion there , and a consequent action upon the space ( 3 ) . In this way each shell of air will be ...
Página 25
... produce a sound that is audible . At any point between the two reflectors there are as many rays passing as meet at a or b , but they are so far apart that the ear cannot take cognisance of them all at once . There is here a pre- cise ...
... produce a sound that is audible . At any point between the two reflectors there are as many rays passing as meet at a or b , but they are so far apart that the ear cannot take cognisance of them all at once . There is here a pre- cise ...
Página 26
... produced at the other . In the case of persons talking , the speakers might be many times at one focus , and no one at the other to hear them ; and vice versa , a person might be at either focus when no sound was at the other to be ...
... produced at the other . In the case of persons talking , the speakers might be many times at one focus , and no one at the other to hear them ; and vice versa , a person might be at either focus when no sound was at the other to be ...
Página 27
... produced by more complex means . Fig . 22 represents an imaginary case of this kind . A and B being the positions of the person producing and the person hearing the Ъ Fig . 21 . B sounds , the variety of echoes would be caused by the ...
... produced by more complex means . Fig . 22 represents an imaginary case of this kind . A and B being the positions of the person producing and the person hearing the Ъ Fig . 21 . B sounds , the variety of echoes would be caused by the ...
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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.