light and magnetism by showing that light's own magnetic field > WEB 중요웹사이트연결

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Recent physics research is rewriting the relationship between light and magnetism by showing that light's own magnetic field plays a role in phenomena like the Faraday effect}, which was previously thought to be caused only by light's electric field. New theories now account for the light's magnetic field, unifying previously conflicting views on light's momentum and revealing new ways to use light to manipulate the magnetic properties of materials.
Light's magnetic field and its effects
Faraday effect: Michael Faraday's 1845 discovery showed that a magnetic field can rotate the polarization of light. Previously, it was believed this was solely due to the interaction between light's electric field and the electrons in the material.
New research: Recent studies demonstrate that light's magnetic field interacts directly with the spins of the material, contributing to the Faraday effect. This new understanding provides a more complete picture of the phenomenon.
Momentum controversy: A century-old debate about how much momentum light carries when passing through a medium has been resolved by accounting for light's spin. The new framework shows that the conflicting theories of Abraham and Minkowski are both correct but describe different aspects of the same underlying structure.
Manipulating matter with light
Transforming materials: Researchers have discovered a way to use light to alter a material's magnetic properties, in effect transforming one material into another at room temperature. This is achieved by using light to excite magnon pairs, which reshapes the material's magnetic state.
Data storage: This light-based control can be used to switch properties like ferroaxialty in magnet-like materials, with potential applications in building stable and efficient memory devices.
Quantum effects: The ability to control magnetic properties with light without heat could pave the way for controlling room-temperature quantum effects.
Physics of light and magnetism rewritten after almost two ...
Nov 19, 2025 — Physics of light and magnetism rewritten after almost two centuries. An experiment 180 years ago first demonstrated a ...




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