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
Answer:C
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
Explanation: Interaction between matter and electromagnetic radiation can be observed by subjecting a substance to two magnetic fields. One magnetic field must be stationary and the other field must be varying at some radio frequency.