Original file (SVG file, nominally 948 × 721 pixels, file size: 12 KB)

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Summary

Description
English: The checker shadow illusion, originally published by en:Edward H. Adelson. Square A is exactly the same shade of grey as square B.
Date
Source Own work
Author Original: Edward H. Adelson, vectorized by Pbroks13.
SVG development
InfoField
 
The SVG code is valid.
 
This vector image was created with Inkscape.

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
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.

Captions

An optical illusion by H. A. Square A is exactly the same shade as Square B.

Items portrayed in this file

depicts

optical illusion

creator

some value

author name string: Pbroks13
Wikimedia username: Pbroks13
URL: http://commons.wikimedia.org/wiki/User:Pbroks13

copyright status

copyrighted

copyright license

Creative Commons Attribution-ShareAlike 4.0 International

inception

11 December 2018

source of file

original creation by uploader

media type

image/svg+xml

checksum

c64f40fbc973ad8da5a176b7281b6d437cd56843

determination method or standard: SHA-1

data size

12,395 byte

height

721 pixel

width

948 pixel

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current04:37, 14 December 2018Thumbnail for version as of 04:37, 14 December 2018948 × 721 (12 KB)Pbrksagain
04:29, 14 December 2018Thumbnail for version as of 04:29, 14 December 2018948 × 721 (12 KB)Pbrksattempting to pass validator
04:25, 12 December 2018Thumbnail for version as of 04:25, 12 December 2018948 × 721 (12 KB)Pbrksshadows
04:23, 12 December 2018Thumbnail for version as of 04:23, 12 December 2018948 × 721 (12 KB)Pbrksshadows
23:03, 11 December 2018Thumbnail for version as of 23:03, 11 December 2018948 × 721 (12 KB)Pbrksshadows
22:42, 11 December 2018Thumbnail for version as of 22:42, 11 December 2018948 × 721 (8 KB)Pbrksshadows
22:27, 11 December 2018Thumbnail for version as of 22:27, 11 December 2018948 × 721 (8 KB)Pbrksshadows
22:22, 11 December 2018Thumbnail for version as of 22:22, 11 December 2018948 × 721 (8 KB)PbrksUser created page with UploadWizard

Global file usage

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Metadata

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Allikas: https://en.wikipedia.org/wiki/File:Checker_shadow_illusion.svg
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