Optical phenomenon

Optical phenomenon is any observable event that results from the interaction between light and matter.

Optical phenomena are often caused by the interaction between sunlight or moon and the atmosphere, clouds, water, or dust and other particulate matter. An example is the rainbow, when sunlight is reflected by drops of water that fall during rain. Others, such as the green glow, are rare due to weather conditions. Some, such as Fata Morgana, are common only in certain regions.

Other phenomena are simply interesting aspects of optics, or optical effects. Colors generated by a prism are often shown in classrooms as examples.