What does the Larmor equation represent in terms of frequency?

The Larmor equation is a fundamental expression in magnetic resonance that describes the relationship between the precessional frequency of nuclear spins and the magnetic field strength in which they exist. Specifically, it is expressed as frequency = gyromagnetic ratio × magnetic field strength.

The precessional frequency refers to how fast the magnetic moments of atomic nuclei spin or precess around the direction of the external magnetic field. The gyromagnetic ratio is a constant specific to each type of nucleus, which relates its magnetic moment to its angular momentum, while the magnetic field strength is the intensity of the magnetic field being applied.

This equation is pivotal in applications such as magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR), where understanding the behavior of nuclei in a magnetic field allows for imaging and analysis of molecular structures. The other options touch on various concepts related to magnetic resonance, but they do not specifically encapsulate the core meaning represented by the Larmor equation regarding frequency.