illusion d'optique, tpe, ilusion, optique
geometrical optical illusions (page 4)
 illusion d'optique, tpe, ilusion, optique
   
illusion d'optique, tpe, ilusion, optique illusion d'optique, tpe, ilusion, optique



gallerie of 120 optical illusionsTo have the answer about each illusion : put the cursor on the picture and wait : a text will appear.

© Ophtasurf, 2000-2006
What do you see? A hexagon ?
  
Strange this figure, not ?
  
Is the star more close to the top or to the base of the triangle ?
optical illusion of the hexagon: if you look at better you will see a cube in perspective.   optical illusion of the triangle : If the figure is turned, it is not any more an impossible triangle   optical illusion of the barycentre: the star is not more close to the top of the triangle that base.
    The impossible triangle    
         
What do you see in this figure ?
 
 Look at the central round, it seems to move and float
  
 Here, we see rounds which seem clearer than the background...
Optical illusion of the sun: the central round does not exist   Optical illusion of Ouchi : the central round seems to float.   optical illusion of ehrenstein: the blue rounds do not exist...
    Optical illusion of Ouchi   Optical illusion of Ehrenstein
         
 Are the horizontal lines parallel ?
  
Are the red lines rectilinear ?
  
 Which blue point is in the center of the circle ?
optical illusion of the café wall : they are of course parallel   optical illusion of the secants: the two red lines are completely rectilinear   Optical illusion of the center: It is the blue point of left which is in the center.
Café wall illusion        
© Ophtasurf, 2000-2006

illusion d'optique, tpe, ilusion, optique

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