Rainbows in searchlight beams
Clark, Thomas Alan ; Dyer, Alan
Année de publication
2024
Two independent sections of rainbows produced by the illumination of intense rain by separate shipboard searchlights have been photographed and analysed to compare their characteristics to those measured in normal rainbows produced by sunlight and in garden sprays, and to rainbow theory. Two specific features distinguish these rainbows from normal solar rainbows, the wider spacing of primary and secondary intensity peaks and the broadness of these peaks. The most likely cause of these differences is the angular width of the searchlight beams compared to that of sunlight.</p>
Accès à la notice sur le site du portail documentaire de Météo-France