00440nam a2200181Ia 4500008004000000020001500040041000800055082001300063100001800076245004600094260004500140300001100185650001300196650001100209650001300220650001700233650000800250210210b2006   xxu||||| |||| 00| 0 eng d  a8173195579  aeng  a539 PURM  aPURI (Sanjiv)  aModern physics: concepts and applications  aNew DelhibNarosa Publishing Housec2006  axv,390  aphysics:  aModern  aconcepts  aapplications  aand