Kaksoislähteistä

Kaksoislähteistä refers to a phenomenon in optics and quantum mechanics where a single source of light, often a laser, is split into two coherent beams. These two beams are then typically made to travel different paths before being recombined. The interference pattern created when the beams meet is sensitive to differences in their path lengths, phase, or other properties.

This technique is fundamental to many interferometry applications. In physics, it's used to precisely measure distances, refractive indices, and minute displacements. For example, the Michelson interferometer famously uses this principle to measure the speed of light and detect gravitational waves through the LIGO experiment. In technology, it finds applications in areas like optical sensors, holography, and metrology for quality control and precision manufacturing. The coherence of the light source is crucial for observing stable interference patterns. If the light source is not coherent, the interference fringes will be washed out, making measurements impossible. The precise control and manipulation of these two beams allow for highly sensitive measurements that would otherwise be unattainable.