The power of the rules like a raging wave slammed down, and the winged fairy flew out like a kite with a broken line with blood, and the Duobao Daoist who was bleeding from his mouth and nose was suppressed without any suspense.

The grasshopper shakes the tree to describe the two of them, even if they have the good memory of their master, they can't save the fate of failure.

The coercion of the power of the five rules was directly crushed, and Duobao Dao people had no way to escape at all, seeing that he was bound to die, he gritted his teeth and finally took out a bronze mirror that looked like a Taiji diagram.

This is not an ordinary mirror, but a Tai Chi mirror.

A mirror is an item with a smooth surface, which was originally polished by the ancients and has the ability to reflect light.

There are two types of plane mirrors and curved mirrors, plane mirrors are often used by people to tidy up their appearance, and curved mirrors are divided into concave mirrors and convex mirrors, which are mainly used as clothing mirrors, furniture accessories, architectural decoration parts, etc.

Mirrors are glass or metal products with a regularly reflective surface, polished metal devices and metal-plated reflective films, often framed with metal, plastic, or wood.

Ancient people used obsidian, gold, silver, crystal, copper, bronze, and polished to make mirrors, first copper mirrors used for makeup, and later large mirrors that could reflect the whole body of a person.

In ancient times, water was mostly used to shine and shadow, and the bronze ware containing water was called a mirror, and later it was renamed a mirror.

Originally, the copper mirror was thinner, round with a flange, with ornamentation or inscription on the back, and a semicircular button in the center of the back to place the mirror, without a handle, forming a unique style of Huaxia mirror.

In the early days of the Chinese slave society, it was the Bronze Age, and people understood the relationship between alloy composition, performance and use in the long-term practice of bronze smelting and casting, and could manually control the ratio of copper, tin and lead.

It is recorded in the ancient Jane that "gold has six qi", that is, the six proportions of alloys. The last of them: "Gold, tin half, is called the Qi of the Sui." "It's the ratio used to make copper mirrors.

"Jian" is the mirror, the tin content is higher, because the copper mirror grinds out the bright surface and silver-white color, and also needs to have casting performance to ensure that the pattern is fine.

The Chinese people have made a beautiful "translucent mirror", which can reflect the beautiful pattern behind the copper mirror, so it has aroused great interest in the world.

This is due to the fact that the surface of the mirror has a slight unequal curvature relative to the back pattern after manufacturing, and the back side pattern is reflected through reflection.

This fully illustrates the superb mirror-making technology and deep understanding of light reflection characteristics in ancient China.

Mirrors are a fashion, and obsidian made the world's first mirrors.

Calm pools and rock or earth vessels for water may have been the earliest mirrors in primitive times, but these natural mirrors are a far cry from the handmade mirrors that followed.

The ancient mirror means big basin, and its name is prison.

"The prison can take water from the bright moon, because it can be used as a mirror, because it can be done. ”

The earliest prisons were made of tiles, so the ancient word "prison" did not have gold next to it. It wasn't until people began to cast bronze jian, and later the character also had a gold character.

The theory of the novel mirror.

Mother-in-law, also known as the ugly girl.

In order to stop the tribal "marriage robbery" incident, the Yellow Emperor specially selected an ugly girl with virtuous character, gentle temperament and ugly appearance, and named her mother-in-law as his fourth wife.

The Yellow Emperor also said: "Those who value beauty and do not value virtue are not true beauty, and those who value virtue and light color are true sages." ”

The Yellow Emperor descended to Shennong, fought against Chiyou, quelled the war, unified the three major tribes, ended the barbaric era, and mankind had just begun to enter the civilized society. Making clothes, building boats and cars, and grooming have also become indispensable things in everyone's daily life.

At that time, in order to tidy up their unkempt face, the ancestors often faced a basin of water, or stood by a calm river or water, and tidied up. Therefore, it is recorded in ancient books that this kind of "looking in the mirror" is called "in view of water".

So, what does this have to do with the mother-in-law?

According to legend, the first mirror used by humans was discovered and made by the mother-in-law.

At that time, the people in the Yellow Emperor's Palace often stood by the water to reflect their faces and dress up.

My mother-in-law felt that she was ugly, so she easily went to the water's edge to dress up, and she didn't show up casually on festivals.

I only know how to work beside the Yellow Emperor all day long.

Once, Tongyu asked her mother to go up the mountain with her to dig slates, but her mother didn't say a word, so she went up the mountain with Tongyu's mother-in-law and her.

The mother-in-law has great strength and digs slate faster than other women.

More than 20 pieces were dug in less than half a day.

At this time, the sun was at noon, and the sun was shining on the earth.

My grandmother suddenly noticed a shining stone chip in the pile of stones, and the sun shone very harshly.

The mother-in-law bent down and gently dug out of the ground with her hands, and when she held it in her hand, she couldn't help but be startled.

What kind of monster is this, his ugly face is all shining on this stone tablet.

Even she herself thought it was strange!

She quietly hid this stone fragment on her body, and returned to the Yellow Emperor's Palace without telling anyone about it.

She took advantage of the fact that there was no one around, and took out the stone chips, and found that the surface of the stone chips was uneven.

The faces reflected on it look strange.

My grandmother went to the workshop where stone knives and stone axes were made, found a grinding stone, pressed the stone chips on top and rubbed them repeatedly, and with little effort, all the surface of the stone chips was smoothed.

She used it to take a photo, and it was much clearer than just now. It's just that his face is still so ugly.

She grinded for a while, picked it up and took another photo, and she was still ugly.

The mother-in-law sighed to herself and said, "It seems that the ugly face can't be blamed on the stone chips." ”

From then on, my mother-in-law never went to the river or the water's edge to dress up.

Every morning, I get up and dress myself up according to the stone chips, and then hide quietly after using them. After a long time, my mother-in-law was careless.

Once, my mother-in-law helped Tongyu to roast meat on the slate, but due to the excessive fire, the slate was burned and exploded, and a piece of gravel slag flew up, breaking my mother-in-law's face and bleeding non-stop.

The mother-in-law hurried back, took out the stone chips, and applied medicine to her face.

Who knows, the Yellow Emperor didn't know when he came back, walked lightly behind his mother-in-law, and found that his mother-in-law was holding something in one hand to take care of herself, and the other hand was sticking medicine on her face.

The Yellow Emperor walked behind his mother-in-law, his head was close to his mother-in-law's shoulder, and he was just about to look closely, but unexpectedly, his mother-in-law exclaimed!

She found the face of the Yellow Emperor on the stone tablets.

When she turned her head to look, she saw that the Yellow Emperor was standing behind her.

The Yellow Emperor asked his mother-in-law, "What are you holding in your hand?" ”

The honest and loyal mother-in-law, as soon as she heard the Yellow Emperor's questioning, knew that she must not coax the Yellow Emperor in this matter, and knelt in front of the Yellow Emperor with a "poof".

The mother-in-law told the Yellow Emperor from beginning to end about the discovery of this shining stone tablet, and begged the Yellow Emperor to forgive her.

When the Yellow Emperor heard this, he laughed, put his hands around his mother-in-law and said: "This is a great discovery for you, not only are you right, but you have also made a great contribution!"

After the Yellow Emperor said that, he immediately called the ancestor, Fang Lei, and Tongyu to take out the stone piece of his mother-in-law, which can see people's faces, and let her three wives have a look.

The ancestor smiled and said: "Yellow Emperor, no wonder I haven't seen my mother-in-law go to the waterside to dress up for a long time, it turns out that she has this treasure." ”

Tongyu then said: "Yellow Emperor, this discovery should be credited to my sister-in-law!"

The Yellow Emperor said excitedly: "Of course you have to take a credit!"

People use mirrors in the history of the Chinese nation, since then.

Gu Jian said: "Xuanyuan is a mirror, the emperor will be the queen mother, cast the mirror twelve, and use it as you go." Raozhou old Xuanyuan cast mirror in the lake, now there is Xuanyuan grinding mirror stone. ”

With the development of smelting technology, human beings have invented iron mirrors and copper mirrors, which are not only tools for dressing and plastic surgery, but also handicrafts with beautiful shapes.

The reflection of light from a mirror obeys the law of reflection, and its reflectivity depends on the angle of the incident light, the smoothness of the mirror, and the nature of the coated metal film.

The imaginary line perpendicular to the mirror is called the normal, and the angle between the incoming ray and the normal and the angle between the reflection line and the normal are equal.

The object in front of the plane mirror is formed into an upright virtual image behind the mirror, and the distance between the image and the mirror is equal to the distance between the object and the mirror.

If you want to see your entire length in the mirror, the mirror must be at least half the length of your own body because the angle of incidence is equal to the angle of reflection.

Whether it is a flat mirror or a non-plane mirror, the light will obey the law of reflection and be reflected by the mask, and the reflected light can form vision in the retina after entering the eye.

On a flat mirror, when a parallel beam of light hits the mirror, the whole will change direction in a parallel pattern, and the image is the same as what the eye sees.