The Collaborative International Dictionary
magnetic resonance \magnetic resonance\ n. (Physics) A phenomenon resulting from quantization in the magnetic field of electrons or atoms or molecules or nuclei exposed to an external magnetic field, by which a narrow frequency band of radio waves may be absorbed and re-emitted by the object.
WordNet
n. resonance of electrons or atoms or molecules or nuclei to radiation frequencies as a result of space quantization in a magnetic field
Wikipedia
Magnetic resonance can mean:
- Nuclear magnetic resonance, a physical phenomenon
- Magnetic resonance imaging
- Electron paramagnetic resonance
Magnetic resonance is a phenomenon that affects a Magnetic dipole when placed in a uniform static magnetic field. Its energy is split into a finite number of energy levels, depending on the value of quantum number of angular momentum. This is similar to energy quantization for atoms, say in H atom; in this case the atom, in interaction to an external electric field, transitions between different energy levels by absorbing or emitting photons. Similarly if a magnetic dipole is perturbed with electromagnetic field of proper frequency(E/h ), it can transit between its energy eigenstates, but as the separation between energy eigenvalues is small, the frequency of the photon will be the microwave or radio frequency range. If the dipole is tickled with a field of another frequency, it is unlikely to transition. This phenomenon is similar to that, when a system is acted on by a periodic force of frequency equal to its natural frequency.
Usage examples of "magnetic resonance".
The doctors knew this but wanted to see what the physicists could tell them from the nuclear magnetic resonance imaging.
Given the size of these cortex fragments, I can probably generate enough field strength just by using my tricorder's magnetic resonance sensor at close range.
We can confirm this localization in living patients using magnetic resonance images (MRI).
At first no one knew how Hortas found their way around, but Mama figured that Hortas sensed magnetic resonance variances in rocks.
He thought he could do what Hortas did, but in space, by mixing gravity and magnetic resonance to bend space-time in a way that’.
He started a second company, Advanced Magnetics, which owned several patents essential for the new Magnetic Resonance Imaging machines that were starting to revolutionize medicine.