fogív

Fogív, also known as a fog bow or white rainbow, is an optical phenomenon similar to a rainbow, but it appears as a white or pale arc. It is produced by the same mechanism as a rainbow, the refraction and reflection of light, but it occurs when fog droplets are much smaller than those in rain. The small size of fog droplets means that light is scattered rather than refracted at specific angles, resulting in a lack of distinct colors. Instead, the light from the fog droplets is seen as a white or pale arc.

Fog bows are most commonly observed when the sun is behind the observer and fog or mist is in front. The phenomenon is often seen from high vantage points, such as mountains or tall buildings, where observers are above the fog layer. It can also be seen from airplanes. While fog bows are less dramatic than rainbows due to their lack of color, they can be equally beautiful and are a captivating sight for those who encounter them. The intensity of a fog bow depends on the density of the fog and the brightness of the light source. In very dense fog, the fog bow may be barely visible, while in lighter fog, it can be quite distinct.