An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 20
... tion which a person would take . It is common to speak of light , heat , and sound as travelling in straight lines , but it would be , I think , more theoretically true to describe the motion as spherical , the source of the light ...
... tion which a person would take . It is common to speak of light , heat , and sound as travelling in straight lines , but it would be , I think , more theoretically true to describe the motion as spherical , the source of the light ...
Página 21
... tion , whether these spherical shells of air are really all of the same thickness , as is usually described to be the case . ( 5. ) Intensity of Sound . - This depends entirely upon the force with which the sound - wave impinges upon ...
... tion , whether these spherical shells of air are really all of the same thickness , as is usually described to be the case . ( 5. ) Intensity of Sound . - This depends entirely upon the force with which the sound - wave impinges upon ...
Página 23
... tion and not of matter , it might be enough to point out the many parallels in heat , light , and electricity , the exceeding probability that sound is a phenomenon of like nature , and the absence of any facts to suggest any other ...
... tion and not of matter , it might be enough to point out the many parallels in heat , light , and electricity , the exceeding probability that sound is a phenomenon of like nature , and the absence of any facts to suggest any other ...
Página 25
... tion of sight . So with the rays of sound proceeding from A to B , the effect of each isolated ray is not sufficient to give to me the sensation of sound ; but when they are collected at b , their combined effect is sufficient to ...
... tion of sight . So with the rays of sound proceeding from A to B , the effect of each isolated ray is not sufficient to give to me the sensation of sound ; but when they are collected at b , their combined effect is sufficient to ...
Página 37
... tion . But , in addition to this , it will send an arrow to a consider- able distance . The force with which it does this is exactly pro- portioned to that which I expend in bending the bow . Upon such facts as these is based the theory ...
... tion . But , in addition to this , it will send an arrow to a consider- able distance . The force with which it does this is exactly pro- portioned to that which I expend in bending the bow . Upon such facts as these is based the theory ...
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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.