Arts & Entertainment

All things entertainment. Music, movies, books, games and funny stuff I like.


About software development, software architecture, design and usablity.


About continuous improvement, learning, communication and culture.

Tools & Technology

About collaboration and productivity applications and social media.


Photographs taken on my trips to Asia, Australia, Europe, North America and South Africa.

Home » Archive by Tags

Articles tagged with: illusion

Checker Shadow Illusion

September 25, 2010 – 6:15 am | No Comment | 632 views
Checker Shadow Illusion

This illusion was discovered by MIT professor Edward Adelson.
The dark square A outside the shadow is the same shade of gray as the light-colored square B in the middle of the shadow.