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Biology les Mendelcollege

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Biology optical illusions 

Mendelcollege

Biology

Optical illusions 

Biology

What is Biology?

•  Bios 
• Logos 

Mendelcollege

• Gregor Mendel (1822-1884)
• An Austrian monk
• ¨Father of Modern Genetics¨
• Figuring out the basic rules of how traits are inherited

Types of optical illusions

• Motion illusion 
• Ambiguous illusions
• Contrast illusion
• Perspective illusion 
• Color after effect illusion 

Motion illusion 

• Trick our brain
• Spiral effect
• Movement in the circles where you don't focus

Ambiguous illusions

• Memories are stored in our brains.
• This impacts what you recognize in  ambiguous images.

What do you see first?

Duck

Rabbit

Ambiguous illusions

• Memories are stored in our brains.
• This impact what you recognize in  ambiguous images

What do you see?

Old lady

Young woman

Contrast illusion

• Happens where the object's surrounding colours trick the eye into incorrectly interpreting the color.

Which is lighter? (A / B)

A

B

Equally light

Contrast illusion

• Happens where the object's surrounding colours trick the eye into incorrectly interpreting the color.

The Hermann Grid

• The high contrast black and white areas fool the eyes into perceiving a gray circle at each intersection

Buildings in Egypt

Which building is in the front of the other?

Left

Right

Buildings in Egypt

The right building is brighter which fools our brains into thinking it's closer to us than the left building

Perspective illusion 

• Far away objects project onto smaller retinal images and are thus seen as smaller than those near by. 
• same size objects may appear as different if placed on a persective drawing.

Who is the biggest?

Right

Middle

Left

Perspective illusion 

• Far away objects project onto smaller retinal images and are thus seen as smaller than those near by. 
• same size objects may appear as different if placed on a persective drawing.

Color after effect illusion 

Refers to visual images that are seen after the actual visual stimulus has been removed.

How does the Human eye work?

How to draw a 3D hand?

       You will need:

• A piece of paper
  
• Pencil and eraser
• Felt tip markers- any colors

Questions?

For more information please check : https://mendelcollege.nl/

For more information 

please check

https://mendelcollege.nl/