Further research found that symmetry is also an important factor in human beauty. The physical structure and layout of the human body are symmetrical in external form. For example, the face, with the bridge of the nose as the center line, has eyebrows, eyes, cheekbones and ears on the left and right, and the corners of the mouth and teeth (Tag, wiki) on both sides are also symmetrical. The front (Tag, wiki) of the body is centered on the sternum, and the back is centered on the spine, and the left and right breasts, shoulders and limbs are symmetrical. If this symmetry is destroyed, it will not give people a sense of beauty. Therefore, restoring symmetry is one of the important principles of human beauty. However, symmetry is relative and cannot be absolute. If all parts of the human body are absolutely symmetrical, it will lose its vivid aesthetic feeling.
The greatest discovery about the law of human beauty is the discovery of the golden section law. The so-called golden section law refers to dividing a line or object with a certain length into two parts, so that the ratio of one part to the whole is equal to the ratio of the rest to this part. The ratio is 0.6 18: 1. According to research, as far as the whole human body structure is concerned, the division of each part follows the golden section law. For example, the navel is the golden section of the body: the ratio of the body length above the navel to the body length below the navel is 0.6 18: 1. The human body also has three golden sections. First, the Adam's apple, which is divided into throat to the top of the head and throat to the navel, is also 0.618:1; Second, the elbow joint, the ratio from it to the shoulder joint to it to the middle fingertip is still 0.618:1; In addition, the ratio of middle finger length to palm length and the ratio of palm width to palm length are also 0.6 18: 1. The ratio of crown length to crown width of teeth is also very close to the golden ratio. Therefore, it has been suggested that if the human body meets the above ratio, it can be regarded as a standard Tag or wiki. The arrangement of plastic arts in accordance with the golden section law can really give people a harmonious aesthetic feeling. More interestingly, people find that the most scientific way of life is to arrange the schedule (Tag, wiki) according to the golden section law, that is, 15 hours of activities and 9 hours of sleep every day. Nine hours of sleep is not only beneficial to the activities of cells, tissues and organs, but also to the coordination of various systems of the body, thus contributing to the metabolism of the body and restoring physical strength and energy. The time ratio (15: 24 or 9: 15) is about 0.6 18.
It is precisely because the golden section is so magical that it is fully displayed in the human body that some people regard it as an inherent aesthetic measure of human beings. According to this view, anything that conforms to the golden section must be beautiful. For example, all kinds of our furniture are not square, but almost all of them are of a certain length ratio, which must be close to 0.6 18. The screen of TV, the door opening of refrigerator, the design of doors and windows, etc. Are consciously or unconsciously following the golden section law. Even the announcer's position on the stage is generally 0.6 18 of the full width of the stage, and the visual image of the audience is the best. The effect of appearing in the middle of the stage is definitely not as good as that position.
The golden section was studied by the great mathematician Hua, and profound scientific truth was discovered. The "optimization method" he popularized a few years ago (also called 0.6 18 method) has made great contributions to scientific experiments and solving many difficult problems in people's real life. And the mystery of this science can be perfectly expressed in the human body, which is the essence of magic.