Magnetic field strength is proportional to Larmor frequency (precession frequency). By measuring the Larmor frequency of atoms, we can determine the magnetic field in which the atoms are immersed.
Measurement of the Earth's magnetic field with atoms and light.
Sensing of the electric component of electromagnetic fields
Physiological Monitoring (Sensing) includes Remote Physiological Monitoring (Sensing) performed with non-contact remote techniques which use physiological monitoring RADAR systems.