An Elementary Handbook of PhysicsBlackwood, 1871 - 389 páginas |
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Página 21
... thickness of the shells , i . e . , lengths of the waves , con- tinuing the same , according to some theories ) , until its 5 4 3 2 1 Fig . 17 . further progress is stopped by some obstacle . If this be a large flat surface the sound is ...
... thickness of the shells , i . e . , lengths of the waves , con- tinuing the same , according to some theories ) , until its 5 4 3 2 1 Fig . 17 . further progress is stopped by some obstacle . If this be a large flat surface the sound is ...
Página 28
... thicker in the middle , and gradually decreas- ing in thickness towards the edge , and of greater density than the air . In each case this convex body acts as a double prism ( or as two prisms base to base ) on the rays falling on it ...
... thicker in the middle , and gradually decreas- ing in thickness towards the edge , and of greater density than the air . In each case this convex body acts as a double prism ( or as two prisms base to base ) on the rays falling on it ...
Página 43
... thickness , length , and with equal degrees of tension , they produce but one sound practically - i.e . , the two sounds are so exactly alike that they blend into one louder sound ; the ear is unable to distinguish one from the other ...
... thickness , length , and with equal degrees of tension , they produce but one sound practically - i.e . , the two sounds are so exactly alike that they blend into one louder sound ; the ear is unable to distinguish one from the other ...
Página 44
... thickness lessened . Thus on a violin , where the strings are all of equal length , and where it is yet essential ... thickness . So that , other things being equal , the thicker string gives the lower note , and the thinner string the ...
... thickness lessened . Thus on a violin , where the strings are all of equal length , and where it is yet essential ... thickness . So that , other things being equal , the thicker string gives the lower note , and the thinner string the ...
Página 45
... thickness or in the way of density . ( 21. ) Octaves of Sound : Scales . — We have seen that the whole string and the half of it produce harmonious sounds . What will be the result of dividing the string or wire into three equal parts ...
... thickness or in the way of density . ( 21. ) Octaves of Sound : Scales . — We have seen that the whole string and the half of it produce harmonious sounds . What will be the result of dividing the string or wire into three equal parts ...
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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.