"Father, my son is going to the medical school and find a few Turkic captives to do an experiment!" Li Chengqian didn't know what kind of madness the old man was making, but it seemed that he was coming at him.

"Where are those alchemists?" Li Er glanced at Li Chengqian and the others with cold eyes, and asked in a deep voice.

"Fangshi? They are conducting experiments in the courtyard of the West Pond. Li Chengqian was stunned for a moment, not knowing why the old man asked about those monks.

Li Er said expressionlessly: "Take me to see!" ”

Look? Li Chengqian, who didn't understand what Li Er meant, twitched at the corner of his eyes, wondering if the old man was going to be cremated as a heretic like those priests in the West, right?

"What? Any questions? Seeing that Li Chengqian didn't move for a long time, Lao Li's voice gradually cooled down.

In the past few days, he has been worrying about the affairs of Goguryeo, but he didn't expect that in the early dynasty, there was an imperial history to impeach Li Chengqian, saying that the kid was recruiting a bunch of monks and planned to study the method of immortality.

Lao Li may not care about other things, and let Li Chengqian toss around, but this method of immortality is an exception.

So Lao Li, who listened to the words of the imperial history, gathered a group of civil ministers and military generals, and rushed to the East Palace in a group of horses, intending to see what Li Chengqian was doing with those monks.

"Naturally, there is no problem for my father to see it, but it is best for my father to make some preparations before watching it." Li Chengqian saw that the old man insisted on seeing it, so he could only reluctantly agree.

I only hope that the bastards in the Xichi Courtyard had better not study anything flammable and explosive at this time, otherwise they will scare the old man and be wronged if his head is cut off.

Li Er was a person who listened to persuasion, and after seeing that Li Chengqian and Ye Mei were fully armed, he also put on a toner mask and goggles as he said.

In the courtyard of the West Pond, three or four monks were busy preparing something, and a few others were experimenting with brushing silver nitrate on the glass.

"They...... Is this a mirror? Li Er stood at the gate of Xichi Courtyard and looked at it for a while, roughly saw some doorways, and asked angrily through the sound of the mask urn.

Li Chengqian pointed to the lid of the pot that was lifted aside and placed on the ground to dry, and said: "The one they got is a condenser, that is, the mirror itself has an arc, which can condense the light to a point through reflection and use it to achieve the purpose of heating. Of course, the one they made was so small that it could only boil water or something. ”

"Boil water? You're saying you can boil water with that thing? Li Er asked in disbelief. Feel like a fool.

He understood every word Li Chengqian said, but if it was connected, he didn't even know what this bastard was talking about.

He can roughly guess a little bit of reflected light, but he doesn't know if it's right yet, but what is a condenser? Can light also gather? What does it mean to be reflected to a point?

Li Chengqian didn't know what the old man was thinking, and he was still chattering: "Of course you can boil water, and if this thing is made big enough, it will not be a problem to melt gold and iron." ”

"Nonsense!" Li Er finally couldn't listen to it anymore, turned around and walked outside the Xichi Courtyard, feeling that Li Chengqian was just bragging, relying on his ability to never forget and bully himself to read as many books as he did.

It's incredible enough to boil water with all of it, and now it is said that it can melt gold and turn iron, isn't this special nonsense, is it really stupid to be Lao Tzu?

Everyone in Datang lives under the sun, if this light can really boil water and melt iron, then there are still living people in Datang now?

"Hey, hey, father, don't go, the son hasn't finished talking yet." Seeing the old man turn to leave, Li Chengqian hurriedly chased after him.

When he got outside and took down all the 'equipment', Li Erhu asked with a face: "Say, what are you tossing about, don't fool me with the matter of the sun boiling water!" ”

"Father, this is science, you have to believe it." Li Chengqian was on a par with the old man this time, and as he spoke, he came to Kong Yingda's side, pointed to the reading glasses that the old man hung around his neck and said, "Master Kong, borrow your old glasses for use." ”

Old man Kong took off his glasses from his neck and handed them to Li Chengqian suspiciously, not knowing what the hell he was going to do.

This kid is too good at tossing, there will always be some strange ideas, Li Er said that boiling water with sunlight even though Lao Kong didn't understand what it meant, but looking at Li Chengqian's performance, it seemed that he wanted to show his hand, and he really planned to use the sunlight to boil the water.

Now there is a lot of fun to watch, the group of people who came with Li Er are those who are not afraid of chaos, and when they saw that Li Chengqian seemed to really want to use the sun's rays to boil water, they immediately forgot the purpose of coming here.

Even Li Er muttered a little, feeling that he seemed to be a little arbitrary just now.

With a piece of paper, a piece of glass and a little water, and reading glasses in his hand, Li Chengqian gave a vivid physics lesson to everyone including Li Er.

It didn't take long for the water on the glass to dry under the specks of light gathered by the reading glasses, and the paper to ignite under the spots.

For a while, everyone was in an uproar, as if they had seen a miracle, only Li Er felt a little embarrassed, and kept frowning and silent, and the other was that the old man Kong Yingda Kong was wiping his sweat vigorously, and he couldn't avoid the reading glasses returned by Li Chengqian.

Damn, I knew this thing could burn paper and boil water dry, I shouldn't have worn this thing in the first place, these reading glasses are so dangerous.

"Master Confucius, rest assured, as long as you don't wear it to look at the sun, there will be no problem, and it won't burn your eyes." Lao Kong's attitude made Li Chengqian faintly guess, and explained the precautions for wearing reading glasses to the old man, and then forced the glasses to him.

Li Er slowly cleaned up his mood at this time, and changed his mind very much, although he was a little embarrassed to be an old man just now, but from another angle, it seems to be a very glorious thing to have such a long-faced son.

Listening to sighs such as 'why can't that little bastard in my family do this', Li Er decided to forgive Li Chengqian once.

However, the matter of 'boiling water' has been solved, but the matter of 'immortality' has not yet been settled, although Li Er has a hunch that those monks are likely to be engaged in something called science, but it is better to ask than not to ask.

So after Li Chengqian finished returning his glasses, he coughed lightly and asked, "You got those Fang Shi back, but you are studying the matter of 'immortality'?" ”

"Immortality?" Li Chengqian's eyes almost didn't pop out.

Since the first feudal dynasty of mankind, there have been people who have been studying things that have not yielded a result for more than 2,000 years, who has the leisure to continue to study that?

(End of chapter)