| Corrosion coupons - an illusion
... or is it ? Something more light-hearted ... Someone asks you (with a certain twinkle in the eye) which of the two corrosion monitoring coupons - from the sketch below - you would like to use: "Do you prefer the longer one ... ?"
Schematic - based on the famous table top illusion by Roger N.
Shepard Having studied Roger N. Shepard's table top (and other) illusion(s), you suspect that the two coupon plates are actually the same in size and shape and that only the perceived perspective and changed orientation makes them appear to be dimensionally different. Not convinced (?) ... then measure the two plates. Prepared and published February 8, 2004 on corrosion-club.com.
Reference: Links: More on the brilliant illusions created by Roger N. Shepard can be found by using the google search engine at: www.google.com
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