File:Optical grey squares orange brown.png
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Optical_grey_squares_orange_brown.png (344 × 269 pixels, file size: 22 KB, MIME type: image/png)
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Summary
| Description | An optical illusion. Square A is exactly the same shade of grey as square B. See demonstration. | ||
| Date | Original in 1995, this file in January 2004 | ||
| Source |
File created by Adrian Pingstone, based on the original created by Edward H. Adelson Wayback Machine 2017 archive link |
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| Author | Original by Edward H. Adelson, this file by Gustavb | ||
| Permission (Reusing this file) |
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Licensing
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:21, 25 June 2016 | | 344 × 269 (22 KB) | Oshwaddup | User created page with UploadWizard |
File usage
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