What is NMR is based on the principle of and explain in detail?
The phenomenon of 'nuclear induction', later to be termed 'nuclear magnetic resonance' (NMR), was described by Bloch and Purcell and their colleagues in 1946. NMR has been used extensively for studying the propeies of matter at the molecular level (NMR spectroscopy). In applications to medicine, the term 'nuclear' has been dropped, leaving it as magnetic resonance or MR(Ref: Grainger&;s diagnostic radiology, 6th ed; page 90)