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first alr-wave implled in the transmission of sound is of the transverse waves, while the second is of longitudinal waves in the orthodox Miinnosaka view of Sabara Svanin the alr-wavc furming physical sound signilius a series of conjunctions and disjunctions of air-particles with the rarefaction and condensation and suggest longitudinal waves 27 Sound dis out it list with the growing of the momentum of the impact of suries feebler ind feebler in the course of transmission of sound through the 11-particles Another VICX is that the propagation of sound is not ellected from molecule to mlecul, but it Spread, in ever expanding c rcles just as evidenced in water-wavea, perhips in splicrical layers by thu compression of masses of air, the waves of which are very fast 33 There is a striking sinularity between the Jain view and the Nytya-Valseşiha theory on the wave of sound and its propiation Both of the agree on th: point that sound becomes refracted as well a diffracled according to the cause of its generation It increa es inhonefold on account of fineness and manifoldness and associa thon with other substances, like air, etc and expands in all directions and goes to the last borders of the universe The unbroken (continuous souud attains division and dies out at last, after crossing countable distance with the growing of the momentum of the impact of series feebler and feebler But there is the difference between the two views on the fundamental point that sound is accepted as the quality of akata in the Nyaya-Valgesika philosophy, while it is conceived as the manifestation of Matter in Jalna metaphysics
The Jama theory of wave of sound and its propagation la well suppo rted by modern physics It is explained that "Sound waves, of course, exhibit the properties of reflection, refractiou and diffraction characteristic of all furns of wave notion Such behaviour of sound waves may be rendered visible by the method of spark photography The waves passing before the photographic plate are illuminated for a brief interval by a timed electric spark The slight screase in density in the condensation in the wave front causts soille refraction of the light and thus produces a shadow in the phutograph 33
"If a train of waves is filling a medium, a surface connecting at a given astant all particles which are in the same pbase of vibration constitutes a wave front In the case of sound waves in air, the vibrating source being quite sinall, such a surface will be spherical, and if the distance from the source is large, a small portion of this spherical wave front may be considered as a plane wave If the medium is homogeneous and isotropic, the direction of propagation is always at right angles to the wave front"
"The behaviour of the wave fronts as a uniform medium, bends around obstacles (diffraction), rebounds from a surface (reflection), or changes
| SR No. | 520751 |
| Book Title | Sambodhi 1972 Vol 01 |
| Original Sutra Author | N/A |
| Author | Dalsukh Malvania, H C Bhayani |
| Publisher | L D Indology Ahmedabad |
| Publication Year | 1972 |
| Total Pages | 416 |
| Language | English, Sanskrit, Prakrit, Gujarati |
| Classification | Magazine, India_Sambodhi, & India |
| File Size | 11 MB |