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Illusions of size perception. Encyclopedia of visual illusions

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The phenomenon of irradiation

Which of the inner squares is larger? Black or white?

The phenomenon of irradiation consists in the fact that light objects on a dark background seem to be larger than their real sizes and, as it were, capture part of the dark background. When we consider a light surface against a dark background, due to the imperfection of the lens, the boundaries of this surface seem to move apart, and this surface seems to us larger than its true geometric dimensions. In the figure, due to the brightness of the colors, the white square seems much larger relative to the black square on a white background.

It is curious to note that, knowing about this property of black to conceal dimensions, duelists in the XNUMXth century preferred to shoot in black suits in the hope that the enemy would miss when shooting.

Ebbinghaus illusion

Which circle is bigger? The one surrounded by large circles or small ones?

They are identical.

Baldwin illusion

Which line is bigger A or B?

They are absolutely equal, although line B seems much longer.

Muller-Lyer illusion

(transferring the properties of the whole figure to its individual parts)

Which of the horizontal lines is longer?

Illusion of Yastrov

Which figure is bigger?

They are exactly the same.

Zander's parallelogram

Which line is longer than AB or BC?

In fact, segments AB and BC are equal.

Which segment is longer than AB or CD?

AB and CD are equal.

railroad tracks illusion

The top horizontal line appears longer. This line continues to be perceived as longer, in whatever position we view the drawing. Try turning your head 90 degrees.

Which segment is longer?

The red arrow and the right segment and the right arrow and the left segment have the same length.

kinescope illusion

Which red line is longer?

The red lines in the drawing are the same length!

Vertical-horizontal illusion

The vertical line is perceived as longer. If you look at the drawing with one eye, then the effect is somewhat reduced.

Squaring the circle

The left circle appears larger than the right.

perspective illusion

Which of the parallelepipeds is larger?

Which ice cream is more?

Which telephone pole is longer?

The man in the background and the dwarf in the foreground are the same height

Which line is longer AC or AB?

AC and AB are equal!

Rectangle in perspective

Both rectangles have the same shape and size.

ghosts

The near ghost seems to be larger than the far one, although in fact their sizes are the same.

Two tables (Schmidt Tea)

The two tables are completely identical in both shape and size.

perspective illusion

Which man is taller?

Point and line

The width of the segment and the diameter of the dot are the same, although the dot looks smaller.

nuns

All pairs are the same size.

Motorcycles

The bikes are the same size.

Two triangles

The base of the left triangle appears to be larger than the right one.

The inner circle on the lid of the bucket seems smaller than the bottom one.

However, these circles are equal.

The height of the figure appears to be greater than its width.

Although in reality the figure has the shape of a square.

Look at the numbers "3" and "8"

The top half of each number is equal to the bottom half, isn't it?

Now let's flip those numbers.

The difference in size between the top and bottom halves becomes apparent.

Which woman is fatter?

Which ball is bigger?

The red balls appear to be of different sizes.

small, small, less

Are the cars the same or different sizes?

The giant and the dwarf

Illusion and its explanation.

Helicopters

Which line is bigger - red or blue?

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