👉 Expensive light particles, or photons, are fundamental to understanding various phenomena in physics and are crucial components of electromagnetic radiation. These particles, which carry energy and momentum, interact with matter through processes like absorption, emission, and scattering. Photons are massless and travel at the speed of light in a vacuum, making them incredibly energetic and capable of causing significant effects over short distances. Despite their lack of mass, photons exhibit particle-like behavior, such as being detected as discrete packets of energy, which is fundamental to quantum mechanics. Experiments involving photons, like those conducted in quantum optics and laser physics, often require sophisticated and expensive equipment, including high-precision detectors, lasers, and vacuum chambers, to study their properties and interactions.
