Meanings
nounOppel-Kundt illusion (plural Oppel-Kundt illusions)
plural Oppel-Kundt illusions
- An optical illusion that occurs when comparing the sizes of filled and unfilled parts of an image.
Origin
Named after German physicists Johann Joseph Oppel and August Kundt.
Full word history & related roots →Cite this entry
APA
Oppel-Kundt illusion. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Oppel-Kundt%20illusion
MLA
“Oppel-Kundt illusion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Oppel-Kundt%20illusion. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “Oppel-Kundt illusion,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Oppel-Kundt%20illusion.
Source: Oppel-Kundt illusion on Wiktionary, CC BY-SA 4.0.