What is the meaning of word 'thrust' in: Two principal thrusts in physics are: unification and reduction???
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the principal of thrusts in physics are unification and reduction.
in unification, Diverse phenomena of nature are expressed in few terms of laws and concepts. for example,the law of gravitation. It explains falling of objects on earth,planetary motion, motion of moon, etc.
Only one law explains so much phenomena! it becomes convenient for us to study only one law and understand too many phenomena
2. reduction, in this we derive simpler equations form the complex systems from its constituent simpler parts. for example, BOHR radius, it is a very complex formula, but now we use only the simpler version of it, I.e. r1×n/Z
where n is the no. of shell, Z is the atomic number and r1 is the constant, radius of 1st shel l of hydrogen.
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