A person smokes marijuana as marijuana enthusiasts mark the informal annual cannabis holiday, 4/20 (four-twenty), corresponding to the numerical figure widely recognized within the cannabis subculture as a symbol for all things related to marijuana, in Hyde Park in London, Britain on April 20, 2023. (Photo by Maja Smiejkowska/Reuters)

Diana Silva, representing Distrito Capital state, is crowned the winner of the annual Miss Venezuela beauty pageant in Caracas, Venezuela, Thursday, November 17, 2022. (Photo by Matias Delacroix/AP Photo)

Underground dancers dressed in Spiderman costumes perform in the subway of Saint Petersburg late on May 21, 2021. (Photo by Olga Maltseva/AFP Photo)

A worker carries a carp freshwater fish at a breeding site in Iraq's central city of Najaf, on June 13, 2021. (Photo by Ali Najafi/AFP Photo)

Italian singer Benjamin Mascolo and American actress and model Bella Thorne attends the Milano Pride Event in Sempione Square on June 26, 2021 in Milan, Italy. (Photo by Mairo Cinquetti/NurPhoto/Rex Features/Shutterstock)

This photograph taken on June 20, 2021 and received courtesy of Radchadawan Peungprasopporn via her Facebook account on June 22, 2021 shows an elephant searching for food in the kitchen of her home in Pa La-U, Hua Hin. (Photo by Radchadawan Peungprasopporn/Facebook via AFP Photo)

The performers prepare for the show. Fontana, a travelling water circus produced by Cirque Du Liban at Festival City in Dubai. (Photo by Chris Whiteoak/The National)

A fog bow is a similar phenomenon to a rainbow; however, as its name suggests, it appears as a bow in fog rather than rain. Because of the very small size of water droplets that cause fog—smaller than 0.05 millimeters (0.0020 in)—the fog bow has only very weak colors, with a red outer edge and bluish inner edge.