Yuhuatai stargazing upstairs.

Zhao Hao put another chopstick in a half-filled crystal cup, so that the two students understood that light can be refracted

"Knowing that light can be refracted and reflected, we can do a lot of things."

Zhao Hao said, and took out a convex lens specially made by the mirror grinding master.

"Is this a?" Hua Shuyang really knew how to do it, pointed to that thing and said, "My father is relying on this thing to read books now, it can enlarge the words, but it doesn't seem to be so thick." ”

"The principle is the same." Zhao Hao said, pointed the magnifying glass at the sun, and then asked Wang Wuyang to hold a piece of rice paper and stand on the opposite side.

Zhao Hao adjusted the angle to let the sunlight pass through the lens, forming a dazzling white dot on the paper.

After a while, smoke began to rise from the rice paper.

As soon as Zhao Hao raised his hand, he moved the focus away, and the fire did not burn, leaving only a black dot on the rice paper.

The two disciples made another fuss: "It's so convenient to light a fire like this!" ”

"I didn't expect that there would be such a wonderful use!"

"Master, what is the truth of this?" Eryang asked in unison again.

"It's just refraction to bring light together." As if talking about a trivial matter, Zhao Hao put away the magnifying glass and said: "The heat of the sun also gathers at one point, and the temperature continues to rise until the rice paper is lit." ”

"That's why optics is so useful?" Zhao Hao said, and took out the hairpin brass pipe carefully made by the high-speed railworker.

He first pointed to the lenses embedded at both ends, and introduced to Eryang: "This big one is an objective lens, a convex lens similar to reading glasses. The smaller end of the spectrum is the eyepiece, which uses a concave lens similar to a lesser lens. ”

As he spoke, he handed the brass tube to the two and said, "Put your eyes on the end of the eyepiece and see what is going on outside." ”

Wang Wuyang first picked up the copper tube and put his right eye on the eyepiece, and then Zhao Hao guided him to aim the objective lens out of the window.

The window is facing Jinling City.

"Ahh

Wang Wuyang looked at it, exclaimed, and ajeptically looked away.

If Zhao Hao hadn't been prepared, he would have had to throw the copper pipe to the ground.

"How so?" Wang Wuyang's face was pale, and he pointed out the window and shouted, "Jubaomen has just run towards me!" ”

After speaking, he rubbed his eyes, looked at them, and couldn't help but wonder: "Hey, isn't this still there?" ”

"I'll see, I'll see!" Hua Shuyang's curiosity about natural science was already stronger than Wang Wuyang's, so he squeezed his senior brother aside, and then did the same, looking out with a copper pipe.

"Wow, Jubaomen really ran to him!"

With Wang Wuyang's foreshadowing, Hua Shuyang was not frightened, but kept exclaiming: "Not only the treasure gate, but also the Phoenix Terrace and Changganli have become close in front of you." Ah, I can even see the cargo ships on the Yangtze River clearly. Hey, that person peed in the Chaojiang River......"

"I'll take another look!" Wang Wuyang listened to it itchingly, and fought with Hua Shuyang for me.

"Aren't you scared now?" Zhao Hao joked from the side: "How can the treasure gate hit you in the face?" ”

"Master, the apprentice was scared when I saw it for the first time just now." Wang Wuyang greedily looked at the scenery that changed from far to near, and said with a sneer: Now that I think about it, it must be the two mirrors in this tube that bring the distant scene closer. ”

"Yes, it must have taken advantage of the refraction of light!" Hua Shuyang picked up the prism, deflected the light to the wall and said, "Optics is really magical!" ”

Zhao Hao nodded with satisfaction, the scholar doctor of the Ming Dynasty was really like the legend, eager to learn and understanding, and good at accepting new things.

But it's normal to think about it, because just a few decades later, with the introduction of Western science by missionaries such as Matteo Ricci, a wave of Western learning immediately arose among scholars and doctors in the Ming Dynasty. Xu Guangqi, Li Zhizao, Fang Yizhi, Mei Wending, Sun Yunqiu, and countless other scholars who read poetry and books happily accepted the study of Taixi and threw themselves into the wave of translating and disseminating Western science!

The entire Ming Dynasty had the momentum of catching up at that time, but bad luck, natural disasters and man-made disasters unexpectedly interrupted the process, which retreated to the era of ignorance, and let the land of China sink for three hundred years. Until 400 years later, it is still struggling to catch up......

So after Zhao Hao was entangled repeatedly, he still made that decision on the glazed tower.

He wanted to spread this scientific knowledge decades in advance, giving the scholars a little more time. Look at this Da Ming, what kind of world can he give back?

~~

Wang Wuyang and Hua Shuyang were like two children who got a novelty toy, until they saw the sun set and the sky turned dark, so they reluctantly returned the copper pipe to Zhao Hao.

"By the way, Master, what's the name of this thing?"

"You can give me any one." Zhao Hao smiled.

"This thing can be seen thousands of miles away, I think it's called a thousand miles tube." Wang Wuyang proposed.

"I think it's called a clairvoyant." Hua Shuyang shook his head and said, "The tube is too ugly." ”

"Which one does Master think is better?" The two looked at Zhao Hao.

"I think the telescope is good." Zhao Hao smiled, thinking that the original name was still good.

"Just listen to the master." Eryang only blindly worshiped Zhao Hao before. At this moment, they finally clearly realized that Master's knowledge was profound and profound, and I am afraid that no one in this world can match it, and I am afraid that only those ancient sages can compare with it.

"But, Master, we'll have to go back quickly." Wang Wuyang looked at the sky and reminded Zhao Hao: "Otherwise, when the city gate is closed, you won't be able to go home." ”

"Who said you were going back tonight?" Zhao Hao smiled and took out a longer and larger monocular from the wooden box, put it on the windowsill and said, "Let's look at the moon tonight." ”

"Great, Master, so Yaxing!" Wang Wuyang was overjoyed when he heard this: "It seems that tonight, another famous article will come out!" ”

Hua Shuyang also nodded vigorously. For traditional scholars, the bright moon in the sky is almost their spiritual companion.

From 'looking up at the bright moon' to 'thousands of miles together', from 'when is the bright moon', to 'the moon is full of frost'...... I don't know how many literati and told their hearts to Chang'e in the Moon Palace, turning them into peerless masterpieces, nourishing the spiritual world of the Chinese people.

At this time, Gao Wu bought a simple dinner, and Zhao Hao asked the two disciples to tell Gao Wu about the moon while eating the sugar lotus root porridge.

Wang Wuyang talked about the Guanghan Palace on the moon, the osmanthus tree, Chang'e, Wu Gang and the Jade Rabbit, and the toad......

"The Guanghan Palace is thousands of zhang high, the Yuyu Qionglou is like a mountain and the sea, and the fairy Chang'e who lives in it was originally Hou Yi's wife......"

"There is also a five-hundred-zhang high laurel tree in the Moon Palace, and the immortal Wu Gang is holding a giant axe, cutting down that laurel tree day after day. But as soon as the axe left, Katsura's wounds healed immediately. Therefore, Wu Gang cut down Gui all the year round, but he never could cut down this tree......"

"Then why did Wu Gang cut down the tree?" When Wang Wuyang finished speaking, Gao Wu finally asked.

"This ......" Wang Wuyang scratched his head when he heard the words and said, "I really don't know." ”

"I guess, it was the Jade Emperor who promised him that as long as he cut down that tree, he could sleep with Chang'e......" Hua Shuyang couldn't help but smile, and after speaking, he remembered that the master was not yet an adult, and hurriedly slapped his mouth.

"I'm talking nonsense!"

ps. The first more guaranteed is delivered, and the monthly pass is recommended ~~~~