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A CRITIQUE
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mass, no electrical charge and can hurtle with ease through the entire earth 36,
36 37
SYNTHESIS OF PARAMANUS INTO COMPOSITE BODIES
We had discussed the nature of various forces 11 hich
SO 'The Roots of Coincidence" by Arthur Koestler 37. Units of measurement
There are three fundamental units of modern scientific measurement They are units of length mass and time The unit of length metrc, was defined carlier as one ten-millionth part of a quarter mendian In 1967 this was replaced by the wave-length of orange-red radiauon of Krypion86 The present valid definition of the unit of length is 1 650 763 73 wave-lengths of orange-red radiauon of Krypton86 in vacuum Initially the unit of mass 'gramme' was considered the mass of a cubic centimetre of water at ils maximum density Later on in MIS system this was changed to kilogram ie the mass of a cubic accime.cr of water But this suffered from the inherent uncertainty associated with the measurement of volume and temperature !n 1960 kilogram was independently defined as the mass of a platinum-inidium cylinder which is preserver at International Bureau of Weights & Measures at Sevres Paris
This definition of mass has been considered in a mode rather – than a rule So the defining or both mass and length in terms of a
certain wave-length of light may provide a coherent means The wave and particles nature of light inspires Mis SK Mukherjee and A Choudhury to conceive the mass-equivalence of the particle associated with the orange-red radiavon of Kryptonband a suggestion is put forward by them to define kilogram in terms of the mass of a particle whose De Broglie wave-length is already taken for standardisation of length Thus the kilogram can be considered in terms of the number of particles associated with the radiation in order to follow the international convention of standards A precise estimation of the number of particles assumes the value 2 741 18798 x 1035
We have already discussed the unit of time a little earlier
