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Contents of Physics -2 : Sound, Electricity and Magnetism
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ening, intensification and even destruction under different circumstances besides other qualities already mentioned in (i-iv).
(xi) It is active and it moves in air in all directions with different velocities. Its maximum velocity is said to be larger than normal light.'8
(xii) It has qualities of being slow and loud, small and large. It has touch, numericality, quantitativeness, conjunction and concussion.
The above points indicate that as a rule, matter effects matter only. The Jaina logicians have observed many properties of sound studied in current days to prove its material nature. The above points also substantiate the definition of mattergy to apply to sound with its properties of action and perceptibility by external sense and eternal-cum-non-eternal nature. This seems to be quite a good advance over canons. Indian Schools of Thought on Sound:
The above canonical and post-canonical conceptions about sound seem to be realistic and represent a synthetic approach about many of the postulates in other Indian philosophies as could be inferred from Table 3. It could be seen that eternalist Mimāmsakas stand on the one end ( substantiality later a quality, eternality, formless, oneness ) while Vaiseșikas to be on the other extreme ( quality of space, noneternality, form-lessness, multiplicity). By defining a reality as having qualities and modes, Jainas have postulated sound as a manifestation of matergic reality. They have maintained a single term 'sabda' for it in contrast to the three terms ---dhvani, varna and sabda- of the Mimāmsakas The Jainas point out that these terms connote the same meaning as sound, different from words can not be proved. The Vaiseșikas have followed Jainas in this regard.
There seem to be four important points of considera-. tion :
(i) It is a quality and/or menifestation of reality
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