Irradiation illusion
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Black_and_white_squares.jpg/220px-Black_and_white_squares.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
Look up irradiation in Wiktionary, the free dictionary.
The irradiation illusion is an illusion of visual perception in which a light area of the visual field looks larger than an otherwise identical dark area. It was named by Hermann von Helmholtz around 1867;[1] but the illusion was familiar to scientists long before then; Galileo mentions it in his 1632 book Dialogue Concerning the Two Chief World Systems.[2] It arises partly from scattering of light inside the eye. This has the effect of enlarging the image of a light area on the retina.
References
- v
- t
- e
Optical illusions (list)
- Afterimage
- Ambigram
- Ambiguous image
- Ames room
- Autostereogram
- Barberpole
- Bezold
- Café wall
- Checker shadow
- Chubb
- Cornsweet
- Delboeuf
- Ebbinghaus
- Ehrenstein
- Flash lag
- Fraser spiral
- Gravity hill
- Grid
- Hering
- Impossible trident
- Irradiation
- Jastrow
- Lilac chaser
- Mach bands
- McCollough
- Müller-Lyer
- Necker cube
- Oppel-Kundt
- Orbison
- Penrose stairs
- Penrose triangle
- Peripheral drift
- Poggendorff
- Ponzo
- Rubin vase
- Sander
- Schroeder stairs
- Shepard tables
- Spinning dancer
- Ternus
- Vertical–horizontal
- White's
- Wundt
- Zöllner
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/51/Optical_Illustion-Ambiguous_Patterns.svg/30px-Optical_Illustion-Ambiguous_Patterns.svg.png)
- Op art
- Trompe-l'œil
- Spectropia (1864 book)
- Ascending and Descending (1960 drawing)
- Waterfall (1961 drawing)
- The dress (2015 photograph)
![]() | This optics-related article is a stub. You can help Wikipedia by expanding it. |
- v
- t
- e