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Sphere Sizes
Category: Size and Distance | Added: April 9, 2011

This picture shows two spheres in a brick cul-de-sac, but how large is the sphere in the foreground compared to the sphere in the background ? Another example of the Ebbinghaus illusion these two spheres are actually exactly the same size, the sphere in the background only looks larger because of the perspective in the picture - an observer expects the sphere in the background to be bigger.

Image Credit:


Comments (18)

Posted by GOOD on December 9, 2016

What? i don't understand.not the same size
Posted by Ariel on April 4, 2014

I love the Mona Lisa one
Posted by chelsea on December 23, 2012

wha? this is crazy
Posted by may on March 19, 2012

Posted by KalaAzurehowl on March 17, 2012

its just the distence that makes it look the same size like the sun and moon during an eclipse lol
Posted by Slimshady on February 21, 2012

look at the shadow of the bagkground sphere. also look at the shadow on the left side wall. the shadow on the left side wall is the size of the front one so there would technically be your final answer.
Posted by Kitty on February 12, 2012

They don't look the same size, and I used my fingers to measure and it's not right...lol my mind is jacked up.
Posted by Jazzy on February 10, 2012

Posted by Jazmine S. on February 10, 2012

i know
Posted by cheyenne henderson on February 10, 2012

jazmine this is cool
Posted by tad lowe f.b. on February 10, 2012

If u think its cool here is another mind blowing senario .......count the bricks on the side of the wall for the front and back they are truly different sizes according to the brick walls bricks
Posted by gwen on November 30, 2011

eh i dont think so
Posted by harsh thakur on November 19, 2011

they both are equal = ? crazyyyyyyyyyyy
Posted by Meenaka on November 8, 2011

that's exactly right bcos if a image comes from a longer distance its appears to be large and if it reaches near it looks to be smaller that the previous so no confusion the concept is right....
Posted by bony on June 22, 2011

Ja ne its crazy stuff
Posted by Hahahaha on May 31, 2011

OMG!!!! WOW!!! THIS!!! SITE!!! IS!!!! REALLY!!! COOL!!!
Posted by jasmin on April 30, 2011

this is pretty mind-boggling!!
Posted by kagiso on April 11, 2011

this is crazy cool stuf...