Valoilmiö

Valoilmiö is a Finnish term that translates to "light phenomenon" and refers to any observable event involving light. This can encompass a wide range of natural or artificial occurrences. Natural valoilmiö include phenomena like rainbows, auroras (northern and southern lights), lightning, and halos around the sun or moon. These events are often caused by the interaction of light with atmospheric particles, ice crystals, or electrical discharges. Artificial valoilmiö are those created by human activity, such as fireworks, laser shows, or even the illumination from cities. The study of valoilmiö falls under the purview of optics and atmospheric physics. Understanding the underlying principles of light refraction, reflection, and diffraction is key to explaining many of these fascinating visual displays. While some valoilmiö are common and predictable, others are rare and can be quite spectacular.