ò TYoAA'L 'E3A @G88e I0.In contrast to classica T0AA'L 'E3@988e H0jl physics modern physic TKAA'L 'E3@988e I0cs is a slightly looser T,AA'L 'E3@88e I0term which may refer to TAA'L 'E3@>88e H0 just quantum physics o T AA'L 'E3@>88e I0"r to 20th and 21st cent TS AA'L 'E3Dy@D88e I0djury physics in general T AA'L 'E3@88e I0\and so always includes Th AA'L 'E3]@88e I0quantum theory and may TFH AA'L 'E3@,88e H0w\include relativity A ph TbB AA'L 'E3@,88e H0%ysical system on the cl T AA'L 'E3@,88e I0vwassical level is a phys TAA'L 'E3@v88e I0ical system in which th T1AA'L 'E3v@m88e H0.e laws of classical phy TAA'L 'E3@88e I0 sics are valid There ar TAA'L 'E3@ub88e H0iZe no restrictions on th TAA'L 'E3@ub88e I0=|e application of classi TnAA'L 'E3@88e H0,cal principles but prac TxAA'L 'E3@88e H0"tically the scale of cl TAA'L 'E3@88e I0rtassical physics is the T)AA'L 'E3E@88e H0level of isolated atoms TAA'L 'E3E@88e I0; and molecules on upwar TOpAA'L 'E3x@88e I0ds including the macros T; AA'L 'E3q@K88e H0Sgcopic and astronomical T% AA'L 'E3q@K88e I0realm Inside the atom a T AA'L 'E3I@?88e H0nd among atoms in a mol T AA'L 'E3I@?88e H03ecule the laws of class TJ AA'L 'E3I@?88e H0ical physics break down T0q AA'L 'E3I@?88e I0w and generally do not p T,AA'L 'E3@;88e I0rovide a correct descri T'AA'L 'E3@=88e H06ption Moreover the clas TAA'L 'E3@`88e H0+rsical theory of electro T&AA'L 'E3@`88e I0v>magnetic radiation is s TSAA'L 'E3@88e H0mvomewhat limited in its TWAA'L 'E3@88e H0^)ability to provide corr TBAA'L 'E3@88e I0v+ect descriptions since T.rAA'L 'E3@u88e I0quantum effects are obs T[AA'L 'E35&@S88e H0Hdervable in more everyda T(AA'L 'E35&@S88e I0ty circumstances than qu TAA'L 'E3@v88e H02nantum effects of matter TAA'L 'E3@v88e I0y Unlike quantum physics TP AA'L 'E3 @j88e H0( classical physics is g T AA'L 'E3 @j88e H0enerally characterized Tu} AA'L 'E3 @j88e I0by the principle of com T AA'L 'E3@K88e H0oplete determinism altho T:# AA'L 'E3@K88e H0:hugh the Manyworlds inte TAA'L 'E3@K88e H0 hrpretation of quantum m TPAA'L 'E3@K88e I0>echanics is in a sense TPAA'L 'E3'@88e I0Fdeterministic Mathemati TAA'L 'E3@ 88e H0؇cally classical physics TAA'L 'E3@ 88e H0% equations are ones in TAA'L 'E3@ 88e I0Itwhich Plancks constant TAA'L 'E3A@88e I0/does not appear Accordi Tu*AA'L 'E3l@I88e I05cng to the correspondenc T-AA'L 'E3m:@88e H0&e principle and Ehrenfe TPAA'L 'E3m:@88e I0Rlsts theorem as a system TrlAA'L 'E39@O!88e I0" becomes larger or more TVAA'L 'E3@88e H0V massive action Planck TpAA'L 'E3@88e H0t2s constant the classica TW AA'L 'E3@88e I0Ol dynamics tends to eme TJ7 AA'L 'E3K@=s88e I0&crge with some exception T AA'L 'E3ۀ@88e H0qs such as superfluidity T AA'L 'E3ۀ@88e I0 This is why we can usu TK AA'L 'E3]@88e H0@Qally ignore quantum mec T AA'L 'E3]@88e I0