Sending Qu Jiang and the others out of the door, Xia Yanqing's master and servant returned to the room where she was working, sorted out her clothes and prepared for lunch.

Xinxiu brought Xia Yanqing's green sheepskin cloak and said happily: "Grandma is really amazing, that Master Qu still spoke in Xia's mouth when he came, and after a while, he changed his name to Miss Xia." I just want to please my aunt and grandmother, for fear that my aunt and grandmother won't give them a chance to ask for advice. ”

"Hey, hey." Xia Yanqing laughed and listened to this sting.

She put on her cloak and tied the strap, and said, "How can it be as mysterious as you say, but just to speak smoothly." ”

Xinxiu was right, but she nodded embarrassedly and said, that is, don't look at them as court officials, you have to stammer with my aunt and grandmother.

Xinxiu was about to speak, but Xia Yanqing hurriedly interrupted: "Okay, if we can hand over the things, we can also count it as a matter of heart, don't talk about it, go home for dinner." ”

Xinrong answered: "Yes, we are in business, it would be good if we could make money steadily." ”

Xia Yanqing approvingly: "Xinrong is very right. From today on, we won't mention those things, just have nothing to do with us. ”

…………

Qu Jiang gained a lot from this trip, took the things back and settled down as a prisoner, and after eating lunch in a hurry, he asked to see the emperor.

It's not that he doesn't know the color of his eyes and doesn't bother the emperor by looking at the time, but that he came back from the Qingyun Zhai kiln, and the hour was not early. After arranging the materials and items brought back, it was already past noon.

No, after a late lunch, it's time to start work, just in time to ask to see the emperor and reply to the emperor.

The emperor was not surprised that Qu Jiang asked to see him so quickly, just looking at the excitement and eagerness that Qu Jiang showed when he heard Shao Yi's bewitching words yesterday, he knew that he would make an appointment with the Xia family girl as soon as he could vacate the space.

Speaking of which, the emperor appreciated that Qu Jiang could concentrate on the affairs of the prisoner, and did not have those twists and turns.

Although it is sometimes necessary to be a scheming and calculating official and career path, it is more comfortable and can relax after all to deal with people who are simpler and more straightforward.

When Qu Jiang entered the imperial study to salute, the emperor could see at a glance that his interview with Xia Yanqing must have gone very well and satisfied him.

With this realization, the emperor became curious. In terms of professionalism, Qu Jiang and the craftsmen who will be supervisors are the top figures in the craftsman industry.

What did Xia Yanqing do to make Qu Jiang so satisfied?

"Sit down." The emperor looked at Qu Jiang and sat down, and asked, "Qu Aiqing has already met the Xia family, I don't know what is going on?" ”

"Thanks to Your Majesty's blessings, Weichen's trip is extremely successful."

As he spoke, Qu Jiang, who had just sat down, stood up again and saluted deeply to the emperor, "It is Your Majesty's strict governance, the Qingyuan period was clear and the people were healthy, so they could be favored by God, and there were rare glasses and clairvoyants in this world." ”

The emperor was stunned, why did he return to this topic again?

He laughed and said, "What did you see in the Xia Clan, and you were so excited?" ”

In the process of developing the telescope, Xia sorted out a set of theories about telescopes and glass materials. The experimental data and calculation methods are really refreshing. Weichen also read the information presented by Xia, and knew that the craftsman can make advanced knowledge if he achieves the ultimate. ”

Qu Jiang pondered the data he got at Xia Yanqing repeatedly, and digested it for noon, not only did his emotions not calm down, but became more excited.

"Be specific." Obviously, the emperor didn't understand Qu Jiang's words.

If Xia's theories are correct, the distance that the telescope can see will continue to expand. As long as the field of vision is not obstructed, you can see far enough. ”

Qu Jiang didn't dare to say that according to this theory, maybe one day, the telescope will be able to see through the sky, that would be taboo, right?

But it's okay to talk more about the vision of a high-powered telescope.

This time, the emperor understood: "Qu Aiqing's meaning, if it is improved according to Xia's theory, the telescope can see farther than now?" ”

"Yes." Qu Jiang replied with a smile, and took out a small cloth bag from his arms, "Weichen will show Your Majesty a rarity." ”

There were two convex glass lenses in the cloth bag, Qu Jiang took out one of them, asked Sun Congshan for a piece of paper, and said to the emperor: "This shaped glass piece is called a convex lens, it can gather the received sunlight in one point, which can make the item burn." ”

This is mentioned in that booklet, and there is a corresponding theoretical explanation.

"Won't it?" The emperor was intrigued when he heard this, and there was no doubt that the sun was warm. Especially in the summer, the sun is scorching, but it would be an exaggeration to say that the sun can ignite something.

It's winter, and it's even more unlikely, right?

Although the emperor raised questions, he got up from the dragon couch and walked to Qu Jiang's side.

Sun Congshan was serving the emperor, and he was also full of curiosity, so he followed the emperor step by step and stood on the side of the windowsill.

It's a sunny day, and Qu Jiang is standing by the window, placing the paper he intends to light on the windowsill, using a convex lens to find a suitable angle to collect sunlight.

After a few moves, a bright spot appeared on the blank rice paper.

Qu Jiang maintained the same posture, the focus of the convex lens falling on the paper, motionless.

It didn't take long for the white dot on the rice paper to emit a light puff of smoke, and then the rice paper really began to burn.

The moment the flames broke out on the rice paper, the emperor was really startled, and he retreated his body, "This, this is really ignited, no flint and sickle, only glass pieces, can be ignited?" What's going on? ”

That's amazing, isn't it? In this way, wouldn't it be more convenient for the soldiers to use this buried pot to cook rice during the march?

"According to the texts of the sages, the bright spot that makes the paper burn is called the focal point, and it is the deflection of the light when it hits the glass...... Qu Jiang tried to explain it to the emperor briefly with the knowledge he had just understood.

"And this," Qu Jiang said as he handed the glass to the Emperor, "Your Majesty can use this to see if he can enlarge the handwriting on the book." ”

Qu Jiang popularized the emperor's optical knowledge and the research that could be carried out in the future.

When the emperor personally experimented with the focus of the convex lens and the magnifying glass effect, he was really surprised for a while, and he was incredulous.

After trying it a few times, the emperor thought about how the convex lens ended up in Qu Jiang's hands, and he asked, "Has Qu Aiqing already negotiated the remuneration with the Xia family?" Already delivered? ”

With Shao Yi's foreshadowing before, the emperor believes that the Xia family girl will not give up the development of telescopes that can be exchanged for silver.

It's just that I don't know how much silver Qu Jiang used to get back all the information and research items of the telescope.