Random Asides

Spiral Illusion

Photo of Rebecca Watson Rebecca Watson Follow on X Send an email November 2, 2010
3 Less than a minute

Here’s a cool optical illusion you can demonstrate with the springs from two clicky pens:

Photo of Rebecca Watson Rebecca Watson Follow on X Send an email November 2, 2010
3 Less than a minute
Photo of Rebecca Watson

Rebecca Watson

Rebecca is a writer, speaker, YouTube personality, and unrepentant science nerd. In addition to founding and continuing to run Skepchick, she hosts Quiz-o-Tron, a monthly science-themed quiz show and podcast that pits comedians against nerds. There is an asteroid named in her honor. Twitter @rebeccawatson Mastodon mstdn.social/@rebeccawatson Instagram @actuallyrebeccawatson TikTok @actuallyrebeccawatson YouTube @rebeccawatson BlueSky @rebeccawatson.bsky.social

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