Datang: I was exposed by Princess Changle

"And these are the principles and materials needed to make a telescope."

"The best material for this telescope is crystal. Glass is next."

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Chapter 103 With such an artifact, the chances of winning are increased by one point!

The main components of glass and crystal are silicon dioxide. Ordinary glass contains various random impurities, while crystal is silicon dioxide with high purity.

Therefore, the crystal has better light transmission and a more uniform refractive index.Crystals are more suitable for telescopes than glass.

In fact, people hope that the materials used to make lenses or mirrors have good refractive properties, high light transmission, no obvious color absorption, etc., but the materials used to make lenses or mirrors are usually silicate-containing materials. optical glass.

The principle of the telescope is very simple, using the refraction of the light through the lens or the reflection of the light by the concave mirror to make it enter the small hole and converge into an image, and then pass through a magnifying eyepiece to be seen.

Lin Xuan probably knows the raw materials, principles and basic process of making a telescope, but he doesn't know the specific steps of how to make a telescope, but he has a system.

The method of exchanging system points for making telescopes came out in no time.

Now there are dozens of boxes of very pure natural crystal gems in his mansion.

Lin Xuan didn't know how it came here, anyway, it was sent by others one after another.

As long as these crystals are polished into lenses and reflectors, and the distance is adjusted, a telescope can be made to see things thousands of meters away.

But to make it, it takes a lot of time to polish it carefully.

After all, the telescope is also a very delicate instrument, and it can be made by experimenting slowly under such simple conditions.

Of course, it must not be as advanced, as clear, and as far away as the telescopes of later generations.

But it's enough.

It is really not easy for Li Lizhi to know the small hole imaging.

It seems that Li Lizhi, as a boudoir girl, is not just a person who just sticks to reading old-fashioned women's ring books, no wonder the insights revealed before are also extraordinary.

Lin Xuan was also a little surprised, it seems that Chang Ge's family background must be extraordinary!

After the maid brought the ice, Lin Xuan carefully smashed out a piece of ice, and then slowly carved it with an awl.

Li Lizhi and everyone looked surprised and puzzled.

Lin Xuan said slowly: "Changge, these concave mirrors and convex lenses researched by Mozi allow us to see a different world."

Lin Xuan polished the convex lens first, and it was relatively simple to polish it finely with ice cubes.

A convex lens is actually a magnifying glass.

Everything you see will be magnified.

"Here, this is a convex lens."

"The convex lens, which is thick in the center and thin at the edges, mainly focuses light."

Lin Xuan said lightly.

Lin Xuan demonstrated it once, and Li Lizhi held it in front of her eyes and was completely dumbfounded.

These are all extremely profound knowledge in the "Mo Jing", and she just heard about it...

And brother Xuan can really make it?

Brother Xuan is really amazing!

After a while, Lin Xuan polished a concave lens.

He held it in his hand and said, "This is called a concave lens."

"Concave lenses that are thin in the center and thick at the edges are mainly responsible for diverging light."

"The objective lens and the eyepiece on the telescope are usually composed of lenses of these lenses or mirrors."

"To put it simply, this telescope is equivalent to clairvoyance. Standing in place, you can even see birds and beasts thousands of meters away!"

hiss!

Everyone gasped!

clairvoyance? !

Artifact!

Absolute artifact!

Could it be that the son is a fairy?

No wonder it's so extraordinary!

He took out all kinds of artifacts casually, and the look on his face seemed to be the most common thing for him!

It's really amazing!

After Li Lizhi realized it, her face was full of shock and ecstasy!

With this clairvoyance, in this battle with the Turks, Datang will be able to seize the opportunity one step ahead of the enemy!

The opportunity of war is extremely important. Whoever can seize the opportunity first will have the advantage of victory!

At this very moment, Li Lizhi wanted to tell his father, Emperor Li Shimin, this great news!

Li Lizhi asked excitedly with joy, "Brother Xuan, how many binoculars do you have?"

"Can you do a lot?"

Lin Xuan replied indifferently: "At present, this is the only one I have made, and I am still debugging."

"Once the parameters are adjusted and there are enough pure natural crystals, we can naturally make a lot of them."

Li Lizhi was ecstatic when she heard the words!

That's good!

It seems that it is not particularly difficult to make a lot of telescopes!

She immediately wrote to her father and sent people to send a lot of pure natural crystals. By the way, a lot of craftsmen were needed, just let Brother Xuan teach them how to do it.

With binoculars, the soldiers have a better chance of winning against the Turkic army on the battlefield!