Rainbows’ Arch
Refraction of light is key in understanding the arch of rainbows.
The symmetry of the raindrop is such that whenever we view a raindrop along the line of sight of a rainbow ray, we will see a bright spot of reflected/refracted sunlight. Red light makes an angle of 42 degrees between the direction of the incoming ray of light and the line of sight. So, as long as you stand in the line of sight, you will see a brightening. This brightening is the rainbow, with an angular radius of 42 degrees.
* if the Earth wasn’t in the way, rainbows would form a full circle *
(Images by Cheyrl Lovell, experienceproject.com, kidscullinaryadventures.com, onlyhdwallpapers.com, eo.ucar.edu)
JC Penney’s new ad for Father’s Day
The text reads:
“First Pals: What makes Dad so cool? He’s the swim coach, tent maker, best friend, bike fixer and hug giver—all rolled into one. Or two.” The text at the bottom reads: “Real-life dads, Todd Koch and Cooper Smith with their children Claire and Mason.”
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