An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 5
... force from the candle falls on my face , so on that it falls on the book and picture . From the surfaces of these the force is reflected in a second radiation , some of which falls upon my eyes . But the points which radiate this force ...
... force from the candle falls on my face , so on that it falls on the book and picture . From the surfaces of these the force is reflected in a second radiation , some of which falls upon my eyes . But the points which radiate this force ...
Página 6
... force called light falling upon the eye . A vast number of these rays can enter the eye at the same time , each calling forth an idea in the mind . The number and grouping of these rays that reach the eye depend upon the objects before ...
... force called light falling upon the eye . A vast number of these rays can enter the eye at the same time , each calling forth an idea in the mind . The number and grouping of these rays that reach the eye depend upon the objects before ...
Página 9
... force which before it had not . Small pieces of paper , feathers , threads , are drawn to and adhere to it for a time . Here is evi- dently a force capable of producing motion . This force may be conveyed for an indefinite distance by ...
... force which before it had not . Small pieces of paper , feathers , threads , are drawn to and adhere to it for a time . Here is evi- dently a force capable of producing motion . This force may be conveyed for an indefinite distance by ...
Página 10
... force . If I touch the excited conductor , I feel a shock : here I am conscious of the presence of the force by means of my sense of touch : the sparks are not only visible , but also audible ; here my sense of hearing comes into use ...
... force . If I touch the excited conductor , I feel a shock : here I am conscious of the presence of the force by means of my sense of touch : the sparks are not only visible , but also audible ; here my sense of hearing comes into use ...
Página 11
... force capable of producing heat , light , and sound , of decomposing chemical com- pounds , of moving small magnets . All these effects are phases of motion . Fig . 10 . a That This force can be conveyed from one place to another by ...
... force capable of producing heat , light , and sound , of decomposing chemical com- pounds , of moving small magnets . All these effects are phases of motion . Fig . 10 . a That This force can be conveyed from one place to another by ...
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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.