This is the first time Li Hang has taken them out for activities, and it can be regarded as an alternative experience, on weekdays, he is either cooking at home or attending classes.

Some of the things they learned on weekdays are just mathematics and some daily knowledge, but this time Li Hang said that he wanted to take them out to play, which made them a little curious.

More than a dozen boys plus two of Ying Lu's guards, plus a few guards recruited by Wang Dali and Li Hang in the coolies.

This was specially selected by Li Hang, who was Wang Dali's subordinate, and with the observation and cultivation of these days, it was basically certain that there was no problem with these people, so Li Hang directly took all their family to his house.

The female ones will be maids, and as for the small ones, then they will study together.

Anyway, Li Hang's family does not charge tuition.

And now that he has a knighthood, many people are eager to send people to Li Hang's mansion, and it is also a good choice to do things in the mansion in the future.

After all, if you really do a good job and are favored by Li Hang, becoming a domestic servant in the future may also be a way out, at least you don't have to go back to work as a coolie.

Therefore, Li Hang said that he wanted to recruit children to study, and many people sent their children here.

"I'm going to show you something today!"

After speaking, Li Hang took out the best magnifying glass.

"This is called a magnifying glass, this magnifying glass is mainly made of glass, this kind of glass without color transparency is difficult to make, especially this whole piece of glass without any bubbles, but as long as it has a specific shape, this glass will undergo some interesting changes!" Li Hang pretended to be mysterious, and then handed the magnifying glass to Zhou Xin.

As her sister-in-law, she certainly has this privilege.

Holding a magnifying glass, Li Hang pointed to a small sapling on the side and said. "Let's take a look at this leaf!"

There is nothing special about this leaf, but at this time, as long as you look under the magnifying glass, you can quickly find that it is different from what you usually see.

Xiao Nizi walked to the edge of the tree with a magnifying glass, and then screamed "wow". "Brother-in-law! It's huge! ”

An exclamation drew the other children in.

"yes, don't you see that the leaf is getting bigger! Now tell me what you see? ”

"Hmm......" Xiao Nizi was silent for a while, and then turned her head to look at Li Hang. There are so many little fluffs on this leaf! ”

"Hmmm! Is there anything else? ”

"And a big little bug! Big bugs! ”

The little girl said as she magnified the magnifying glass.

"Haha! Brother-in-law, if I put it closer and farther away, I can control the size of this bug! ”

The little girl had a lot of fun, and the others were even more greedy.

"You take turns going to her. Tell me what you saw! ”

Li Hang said and looked at these boys with a smile.

This is just a magnifying glass.,What's the point of this kind of thing.,It's probably just to let the elderly or people with poor eyes see the words clearly.,As for other functions.,This magnifying glass can't do anything.,What? Magnifying glass to light a match?

I haven't made a match yet.

As for other functions, I really can't get it, even if it's the most focused on the skin, the sun doesn't come out much in this winter, and the sun focuses on a fart.

Li Hang sat on the side and waited for them to finish reading, this magnifying glass is not a big deal, but these boys are all curious.

Even the well-informed Ying Lu is in awe.

In his eyes, he can enlarge this leaf and insect, which is a bit of a match with the legendary immortal magic energy.

After reading this, Li Hang took them to the river. "Come on! Come here! One person goes to break a stick! If you want to be straight, you know, you can either go to a nearby farmer and borrow a bamboo pole or something. ”

The refraction phenomenon of water, this is the problem I want to talk about today, this refraction phenomenon is a simple problem that I want to be, and a person who has been mixing by the water for a long time can see it clearly, but the real refraction ratio and angle of refraction can be studied as a mathematical problem.

"But it seems to be a trigonometric function. This one...... Do you want to talk to them about it? Forget it and let them figure it out for themselves! By the way, it can make them think more! ”

Li Hang touched his chin, and then looked at the group of children at this time, which seemed too profound for them.

But it doesn't matter, just wait until later, now it's mainly about enlightening them to discover what this thing does. Let them see the magic of this glass!

Li Hang laughed, this glass is cheap. Things are also relatively simple, and the main materials needed are quartz sand and soda ash. Feldspar and limestone, these things are taken with attention when they are purchased, so it is estimated that no one can know about these glasses except for craftsmen.

The three major artifacts of the traverser, glass, distilled spirit, and gunpowder, are actually just like that, but if you really want to do it well, it's not that simple.

But when it comes to this distilled liquor, Li Hang's biggest feeling is that it is easy to make drinking wine and difficult to make medical alcohol.

It is also difficult to make glass that is colorless and transparent. It's a matter of material.

Of course, it is even more difficult to get those craftsmen to make glass products without a single bubble.

That's the hardest part.

In order to make transparent glass, it is necessary for craftsmen to be sufficiently skilled.

How many times did it take to make this magnifying glass, and it is estimated that there will be enough experiments to make a telescope.

"Brother-in-law! This magnifying glass is amazing! You can see everything! ”

The little girl is so excited that she is dying,

"Amitabha, why am I so lively here, it turns out that you Li Hang is here!" The monk walked over with a smile on his face, and at this time, the monk looked curiously at the magnifying glass in the little girl's hand.

"Monk, you want to come and see it too?"

He was curious to see what the monk could think of this thing.

What does a religious idealist think about materialistic science?

As long as it's not some stupid idealist, stupid materialist.

The little girl handed it to the monk.

Holding the magnifying glass in his hand, the monk Huiyun was stunned.

It took a long time to come back to his senses. "The so-called color is empty and empty is color, and the red dust you see in front of you is not red dust, this thing is so special to think that it is the rolling red dust, it is the test of the Buddha, the eyes can deceive you, but your heart will not deceive you."

Li Hang didn't expect him to say this, but this great monk is also a wonderful person, and it is estimated that other monks and Taoists will fool him.