Optical Illusions

Predictions, Ch. 1, Act. 1

What is an Optical Illusion?

• Any illusion that deceives the human visual system into perceiving something that is not present to exist.

Who’s the Tallest?

Can you build this?

Can you make this?

What do you see?

Can this happen?

Where does the transition take place?

A lonely concert?

How Many Horses do you See?

7

How many monks do you See?

What do you see here?

How Many People do you See?

4

Face or Liar?

What do you see?

How Many Faces do you See?

11

What do optical illusions have in common with science?

• Scientists resort to the power of observation to make sense of data acquired through experimental investigations.

Why are accurate observations important?

• Over 80% of the information you receive is obtained visually.

• Scientists rely on the powers of experimentation involving measurements to separate illusion from reality.

Further Interest

• www.michaelbach.de/ot/

• http://www.mcescher.com/