Light interference occurs when two or more light waves overlap and combine. This interaction can result in areas of increased brightness, known as constructive interference, or areas of reduced brightness, called destructive interference. The pattern created by this combination can be observed in various phenomena, such as the colorful patterns seen in soap bubbles or oil slicks on water. The principle of light interference is fundamental in understanding wave behavior. It is also utilized in technologies like interferometry, which measures small distances or changes in refractive index, and in the design of anti-reflective coatings on lenses to enhance clarity and reduce glare.