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Classical physics vs quantum physics 
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#1
Nov1412, 02:18 AM

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Why do we say that classical physics is a lot different from quantum physics?
The laws that determine the macroscopic world should be derivable from quantum laws. So in a way the Newtonian or classical laws are basically quantum laws( maybe a bit approximated) So why differentiate between macroscopic and microscopic world? 


#2
Nov1412, 02:31 AM

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All dogs may be animals but not all animals are dogs. All classical physics is a consequence of quantum  but not all quantum physics can be described classically. Technically  classical physics is what QM does on average ... so the math is different. 


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