"That's nature, both lenses are flat, and there's nothing new about nature." Li Changsheng was already trembling with laughter, full of humor to entertain himself.

Feng Yuan's face was already flushed, and he glared at Li Changsheng fiercely, this guy obviously saw that he was ugly, and also led him into a misunderstanding, and he was not a son of man.

Lin Shilang hurriedly picked up a lens on the table, handed it over and said, "Fourth brother, this is a convex mirror, which is used with a lookout, which can see farther and bigger." ”

Feng Yuan took it and looked at it suspiciously, then at Li Changsheng with a smile on his face, and hesitantly put it in front of him. I don't know if I don't see it, I was startled when I saw it, and the whole mirror was suddenly in my eyes, Li Changsheng's bloody mouth, two rows of Bai Sensen's big teeth were closed one by one, and they were closed in front of his eyes, which really startled him.

He hurriedly put down the lenses and said hurriedly, "This is ...... Oh, this is a convex mirror, do you use the principle of concave and convex mirror magnification? ”

Since he is following Wang Xiu, he naturally knows physics, not to mention the optical principles that are not too profound, and he understands what the appearance of this thing means.

"Exactly." Zhang Ling said with a smile, that fat face has a deep pride, don't underestimate the lens, the knowledge in it is great, just the focal length and lens quality, how much energy will they consume.

"The third brother's mouth can put down a bucket of rice." Since Feng Yuan understood, he also made a joke.

The brothers laughed again, and Zhao Feixiao's tears came out, and he said hastily: "If the third brother can't eat a bucket of rice, how can he win the martial champion." ”

"There's a sheep to add." Zhang Ling rarely made a joke, but he still had a serious face, and with the fat image, it was really unbearable.

Li Changsheng rolled his eyes and said, "You also eat a bucket of rice and swallow a sheep, and see if you can bring it to the champion." ”

"If I had that ability, I would have become a cardinal commander a long time ago." Zhao Fei smiled hehehe.

Feng Yuan rolled his eyes, can the cardinal be so good? Liu Guangshi was just by chance, relying on the balance of seniority and the imperial court, he became a privy councillor and joined the army.

"This thing is good, the vast sea is endless, the soldier holding this thing on the mast can see the movement dozens of miles away, we can preemptively strike." Li Changsheng said confidently, this thing is a good thing!

The guard navy has thousands of warships, looking at the whole world, there is no power to compete with it, and there are only a few countries with poison, West Java, and Great Food, which can confront the Great Song Expeditionary Fleet, and can detect the enemy in advance, which has a wonderful help for naval warfare.

I think that before the enemy has discovered you, you can make a plan against the enemy and make a deployment that is beneficial to your own side, which is of great significance in naval warfare. Because, whether it is the current or the direction of the wind, it is extremely difficult for the comrades in the sea to have a certain combat mode, and it is extremely difficult to change the formation or make a temporary turn. The benefits of a preemptive strike speak for themselves.

"Developed to the end?" Feng Yuan is more pragmatic and instantly grasps the core of the problem.

"It's not perfect, but it's practical, but it's very difficult to process." Zhao Fei said lightly, this was developed by him, so he naturally has the right to speak.

"Oh, tell me more." Feng Yuan had a hint of curiosity.

"We named it the telescope, and it consisted of glassware." Zhao Fei looked a little excited, and said loudly: "The convex mirror in front of the lookout tube is thick and long, and the lens behind the lookout tube is thin and short. The front mirror gathers the light from the distant scene into an inverted and reduced real image, which is equivalent to moving the distant scene closer to the imaging place at once. The inverted image of the scenery falls right in front of the eyepiece, so that when you look at the eyepiece, it is as if you have magnified it, and the distant scene seems to be close in front of you. However, judging from the current quality, the process is still unsatisfactory and barely usable. ”

"I'm ashamed to say that it's not easy to make glass, and the convex and concave mirror process requirements are quite high, and there is no room for the slightest mistake, and the slightest flaw will cost all."

Li Changsheng raised his eyebrows and said with a faint smile: "If you can improve the quality of glass and form large-scale production, you can make a lot of money." ”

Feng Yuan glanced at Li Changsheng and said with a wicked smile: "The third brother has been out for a few years, but he has learned a lot of business methods. ”

"It's also forced, you have to rely on yourself, you can't be like you, as long as you concentrate on fighting, every qiē has the imperial court to supply, we are very bitter." Li Changsheng said it very playfully, but it revealed a deep sense of helplessness.

Feng Yuan bowed his head silently, he was the one who led the troops to fight, and he knew the hardships of wartime, even if there was sufficient logistics supply, it was not easy to defeat the opponent, and the imperial court did its best in the northwest war, and it was so hard.

The expeditionary fleet guarding the navy is isolated in a foreign land, and it is impossible to do what manpower and materials want, everyone is precious, every armor battle must be carefully maintained, every battle must be carefully calculated, and after the war, it is necessary to seize material supplements, and it is necessary to be self-reliant to support the war, which is ten times more difficult for him, which makes it impossible to refute.

Zhang Ling didn't have the concept of Feng Yuan, and said to himself: "This is true, Hangzhou Wang Yan Chou is diligent. ”

"Oh, it seems that Hangzhou Panzong is interested?" Li Changsheng, as Wang Xiu's disciple, naturally attributed himself to the Wang family.

Zhao Fei smiled disdainfully, the side branches of the Wang family in Hangzhou and Wenzhou are really good at business. Just a few years ago, the Yuquan Mountain Research Institute launched an improved type of glass, which is still translucent, adding various metals to create various colors of glass. The two heads of the side branch came to the door as soon as possible, and got the right to produce without any suspense, and the Shi family was defeated.

It was a large sum of income, which was enough to make people so red that they killed, and for this reason, the Shi family was still indignant, and rumors spread that the prince was faking public affairs and helping private interests.

Of course, the research institute and those people also received considerable expenses, and the money belonging to the research institute was invested in the improvement of glass.

The reason why I rushed to Xingzai was that the frame of the telescope was made by Zhongshan Academy, and it was close to the major yamen of the forbidden army, which was convenient for testing.

Li Changsheng didn't care, who got it or not, this is not what he cares about, whether it can be produced in large quantities is the most important thing, and said calmly: "These are all trivial matters, when will I take out this thing." ”

Zhao Fei glanced at Li Changsheng with disdain, and said in a long voice: "It still takes a lot of effort, I can't eat hot tofu in a hurry, so don't be impatient." ”

"By the way, the telescope is also suitable for Ma Bujun." Lin Shilang came to say.

"If you don't say it, you have to forget, the Tianwu Army is back, I don't know where the fourth brother went, is he going back to the cardinal staff or staying in the palace?" Zhao Fei said coldly.

"I may have to step down, and I don't know where I am going." Feng Yuan replied honestly, with a bit of reluctance.