Interaction between matter and electromagnetic radiation can be observed by subjecting a substance to magnetic fields in which of the following manner?
(a) Both fields should be stationary
(b) Both fields should be varying
(c) One field should be stationary and the other should be varying
(d) It must be subjected to only one field
The question was asked in exam.
The query is from Principle of Nuclear Magnetic Resonance Spectrometer in chapter Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation