On the Connexion of the Physical SciencesJ. Murray, 1858 - 523 pages |
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Page 129
... Reflection of Sound Echoes - Thunder- Refraction of Sound of Sounds . - - Interference ONE of the most important uses of the atmosphere is the con- veyance of sound . Without the air , deathlike silence would prevail through nature ...
... Reflection of Sound Echoes - Thunder- Refraction of Sound of Sounds . - - Interference ONE of the most important uses of the atmosphere is the con- veyance of sound . Without the air , deathlike silence would prevail through nature ...
Page 131
... reflected by an opposing obstacle . The vibrations of the aƫrial molecules are always extremely small , whereas the waves of sound vary from a few inches to several feet . The various musical instruments , the human voice and that of ...
... reflected by an opposing obstacle . The vibrations of the aƫrial molecules are always extremely small , whereas the waves of sound vary from a few inches to several feet . The various musical instruments , the human voice and that of ...
Page 137
... reflection from surfaces ( N. 179 ) according to the same laws as light . Indeed any one who has observed the re- flection of the waves from a wall on the side of a river , after the passage of a steam - boat , will have a perfect idea ...
... reflection from surfaces ( N. 179 ) according to the same laws as light . Indeed any one who has observed the re- flection of the waves from a wall on the side of a river , after the passage of a steam - boat , will have a perfect idea ...
Page 138
... reflection . Consequently a sound from the one will be heard in the other as if it were close to the ear . The rolling noise of thunder has been attributed to reverberation between different clouds , which may possibly be the case to a ...
... reflection . Consequently a sound from the one will be heard in the other as if it were close to the ear . The rolling noise of thunder has been attributed to reverberation between different clouds , which may possibly be the case to a ...
Page 141
... reflected when they arrive at the other end of the rope by the fixed point , and in returning they will occasionally interfere with the advancing waves ; and , as these opposite undulations will at certain points destroy one another ...
... reflected when they arrive at the other end of the rope by the fixed point , and in returning they will occasionally interfere with the advancing waves ; and , as these opposite undulations will at certain points destroy one another ...
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61 Cygni action appears atmosphere attraction bismuth bodies cause centre centrifugal force chemical colour comet consequently copper crystal dark degree density diamagnetic diameter diminishes direction disturbing double stars earth ecliptic effect electricity equal equator ethereal medium excentricity Fcap force glass gravitation greater heat hemisphere increase intensity Jupiter latitude length light lines liquid longitude luminous lunar magnetic major axis mass meridian metallic miles moon motion move nearly nebula nodal lines nodes northern hemisphere NOTE nutation observed optic axis orbit oscillations parallax paramagnetic particles passing perihelion periodic phenomena planets plate polarized pole position Post 8vo produced quantity rays reflected refraction refrangible revolution revolving right angles rings rotation round satellites Sir John Herschel solar spectrum space stars substances sun's surface telescope temperature terrestrial tion tourmaline transmitted tricity undulations Uranus vapour variation velocity vibrations Vols Voltaic waves wire Woodcuts