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+--- Thread: Rainbow over JT (/showthread.php?tid=2457)
Rainbow over JT - burtonwc1 - 09-03-2023
Brilliant double rainbow over Jamestown this evening--both 23-degree (main) and 46-degree arcs visible.
Raindrops are actually spherical, not teardrop-shaped. To produce the 23-degree arc light rays are refracted slightly as they enter the raindrop, bounce off the back wall (reflection), and are refracted again back out towards the viewer. For the 46-degree arc they bounce around inside twice before exiting at a greater angle.