👉 The Casey-Light Particles, also known as light particles or photons, are fundamental entities that represent discrete packets of electromagnetic energy. Proposed by physicist John A. Casey in the 1930s, these particles are the quantum mechanical description of light, embodying both wave-like and particle-like properties. Unlike classical waves, which can have any wavelength and frequency, light particles (photons) have specific energies and momenta, determined by Planck's relation \( E = h\nu \), where \( E \) is energy, \( h \) is Planck's constant, and \( \nu \) is the frequency of the light. This dual nature of light—exhibiting both particle and wave characteristics—lies at the heart of quantum mechanics. Photons are crucial in explaining phenomena such as the photoelectric effect, where light energy is absorbed by electrons, ejecting them from a material, and in understanding the behavior of atoms and molecules at the quantum level. The concept of light particles has profound implications in fields ranging from optics and quantum electrodynamics to cosmology and particle physics.
