{M:H:O} The maths behind the beauty

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What has mathematics got to do with beauty? Actually, a lot. Physical attraction depends on ratio.

Our attraction to another person's body increases if that body is symmetrical and in proportion. Likewise, if a face is in proportion, we are more likely to notice it and find it beautiful. Scientists believe that we perceive proportional bodies to be more healthy.

Leonardo da Vinci's drawings of the human body emphasised its proportion. The ratio of the following distances is the Golden Ratio:

(foot to navel) : (navel to head)

Similarly, buildings are more attractive if the proportions used follow the Golden Ratio.

Golden Ratio

The Golden Ratio (or "Golden Section") is based on Fibonacci Numbers, where every number in the sequence (after the second) is the sum of the previous 2 numbers:

1, 1, 2, 3, 5, 8, 13, 21, ...

We will see (below) how the Fibonnaci Numbers lead to the Golden Ratio:

Ö = 1.618 033 ...

 

Let's look at the ratio of each number in the Fibonacci sequence to the one before it:

1/1 = 1

2/1 = 2

3/2 = 1.5

5/3 = 1.666...

8/5 = 1.6

13/8 = 1.625

21/13 = 1.61538...

34/21 = 1.61905...

55/34 = 1.61764...

89/55 = 1.61861...

If we keep going, we produce an interesting number which mathematicians call "phi" (Golden Ratio or Golden Section):

Ö = 1.618 033 988 7...

This ratio was used by architects and artists throughout history to produce objects of great beauty (like Michelangelo' s "David" and the Greek temples.)

The Parthenon in Greece. The ratio of the distances indicated is the Golden Ratio.

Phi (Ö) is like pi (ð) in the sense that it is an irrational number. There is no equivalent fraction for Ö and its decimal keeps going and never stops.

Sunflower (Image source)

The Golden Ratio also occurs in nature, in the patterns we see in sunflowers, pine cones and so on. This is largely because one of the best ways to efficiently pack things tightly together is using the Fibonacci sequence.

 

Phi - The Key to Beauty

The Phi ration in:

Nature				Human Body				Human Teeth

 

Physical Beauty

Why do many people feel that Jessica Simpson is beautiful?

This mask of the human face is based on the Golden Ratio. The proportions of the length of the nose, the position of the eyes and the length of the chin, all conform to some aspect of the Golden Ratio.

When placed over the photo of Jessica Simpson, we see there is a good fit (that is, the proportions of her face fit the geometrically "nice" proportions of the mask, based on the Golden Ratio).

Her beauty is mathematical!

 

 

 

 

bhumi

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