What does the sudden breaking of the mirror portend?

A mirror is an object with a smooth surface and can reflect light. At first, the ancients used polished bronze as mirrors. There are two kinds of mirrors: flat mirror and curved mirror. Flat mirrors are often used for grooming, while curved mirrors can be divided into concave mirror and convex mirrors, which are mainly used as dressing mirrors, furniture accessories, architectural decorative parts, reflectors for headlights and searchlights, reflecting telescope, car rearview mirrors, etc.

A sign that the mirror is broken.

The mirror is made of glass, so it is normal to break it suddenly during use. In geomantic omen, it is an auspicious sign that a mirror suddenly falls to the ground and breaks into pieces. If the mirror that falls to the ground breaks into pieces, it is a sign that Lily and Bailey in Gigiri are harmless. In China, there is a saying that "it is safe after breaking". We should be as careful as possible when using these daily fragile items. If they are broken and eventually hurt ourselves, it is also a very painful thing.

The origin of the mirror

Mirrors have a long history. Legend has it that the goddess of mending heaven collected an obsidian and polished it into a stone mirror. Of course, the stone mirror polished by Nu Wa can't be found. However, the book Xunyang Ji in the Tang Dynasty records that there is a stone mirror standing on the cliff in Shandong, which is bright and clear, and this mirror can prove it.

In ancient China, it took about 3,000 years from stone mirror to metal mirror. There is such a record in the Spring and Autumn Period's "Zhou Li Kao Gong Ji": "Gold has six qi, and Suk Kim is half mirror, neat." "Sword" is a flat mirror, and "Sui" is a concave mirror, which is used to focus sunlight to make a fire. It is said that the alloy of brass and tin is the material for making flat mirrors and focusing mirrors. This shows that as early as the Spring and Autumn Period in ancient China, slaves knew how to use the principle of light reflection to polish metal mirrors.

As far as materials are concerned, there are bronze mirrors, stone mirrors, gold mirrors, iron mirrors and Yin Hua mirrors. As far as performance is concerned, there are flat mirrors with positive capacity and concave-convex transparent mirrors with condensing and reflecting functions. Scattered in historical records, there are geographical conditions, heart mirrors, bone mirrors and so on.

Shen Kuo, an outstanding natural scientist in the Northern Song Dynasty, once pointed out in On Meng Xi that the ancients had long known the relationship between the curvature of a mirror and the size of an image. concave mirror showed a large face, while the convex mirror showed a small face. So when projecting a mirror, the big mirror should be flat and the small mirror should be convex, so that the face will always be as big as the mirror. At present, the reflective convex mirror on the car and the convex mirror at the corner are all made by using this principle. Shen Kuo also talked about a transparent mirror with an inscription on the back and a * * * cross, which is used to receive sunlight. The pattern and 20 characters on the back are clearly transmitted on the wall of the house.