An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 3
... light , but the energy that calls forth the sensa- tion of light existed long before there were eyes to see . The ... ray communicated to the objects , which sets them in vibration INTRODUCTION . 3.
... light , but the energy that calls forth the sensa- tion of light existed long before there were eyes to see . The ... ray communicated to the objects , which sets them in vibration INTRODUCTION . 3.
Página 6
... ray for ray , sending out as many as it receives , and pre- serving unchanged the grouping , but the face absorbs some and reflects some , and this alternation and variety of light and shade is what gives us the idea of a human face ...
... ray for ray , sending out as many as it receives , and pre- serving unchanged the grouping , but the face absorbs some and reflects some , and this alternation and variety of light and shade is what gives us the idea of a human face ...
Página 16
... ray of light , A 0 , has its direction changed when passing through water , to o o ' , and afterwards , when passing again to air , reverts to a direc- tion o ' B , parallel to A A ' . By it are affected all rays of light passing ...
... ray of light , A 0 , has its direction changed when passing through water , to o o ' , and afterwards , when passing again to air , reverts to a direc- tion o ' B , parallel to A A ' . By it are affected all rays of light passing ...
Página 20
... light . A ray of re- fracted light produces a spectrum , only the middle portion of which is visible to our eyes . ( 4. ) Form of Sound - Waves . - Just as a lighted candle in the centre of a room radiates light to every part of the ...
... light . A ray of re- fracted light produces a spectrum , only the middle portion of which is visible to our eyes . ( 4. ) Form of Sound - Waves . - Just as a lighted candle in the centre of a room radiates light to every part of the ...
Página 25
... light enough to affect my eye with the sensa- 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 ...
... light enough to affect my eye with the sensa- 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 ...
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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.