amazing n i dont know why...

    wondering..

引用

Clockwise or counterclockwise? 方向问题

Spinning Dancer 旋转舞女

 

Answer

有时顺时针, 有时逆时针. 这是一个光学幻像.

It is  an optical illusion that most people see her spin both directions. Sometimes you will see she stands on her left leg and spins to the right. Sometimes you will see the opposite.  It is not a brain test as some people have claimed. To help  people who can’t see the reversal, Look at one of the the two images below (cover the other one if needed).

 

Source (Nobuyuki Kayahara 萱原信幸?)