Otaku Engineer in Great Tang Dynasty Chapter 889: Engineering, new world! (Continued)

In the early days of optical development, the interpretation of colors was particularly difficult. Before Newton, the European perception of color prevailed with Aristotle's view. Aristotle believed that color is not the objective nature of objects, but people's subjective feelings. The formation of all colors is the result of the proportional mixing of light and dark, and white and black.

In early 1666, Newton made a triangular glass prism mirror and used it to study the color of light. To this end, he made the room lacquered and made a small hole in the window to let in the right amount of sunlight. He placed the prism at the entrance of the light so that the refracted light could hit the opposite wall. Through this experiment, he got a colored spot on the wall, the color arrangement is red, orange, yellow, green, blue, Indigo, purple. Newton called this color spot the spectrum.

Later generations will call this experiment a light dispersion experiment!

In 1830, Thomas Young, a British doctor and physicist, opened a small hole in the blinds to allow light to pass through and used a mirror to reflect the transmitted light. Then he used a sheet of paper about 1/30 inch thick to split the light into two beams from the middle. The result was intersecting light and shadows.

This is the famous Young’s double-slit interference experiment, which shows that two beams of light can interfere with each other like waves. This experiment also played a vital role in the creation of quantum science a century later.

Li Zexuan moved these two experiments to the Tang Dynasty in order to let the students of the college understand that the sunlight they can see every day is not as simple as it seems! Just a kind of wonderful substance, understanding its inner part will derive a lot of incredible things!

At this moment, the curtains in the auditorium have been opened, but most people still haven't recovered. They don't understand why there are only two beams of light, but it seems to be many beams on paper. , How did Li Zexuan do it?

"The long mountain, what was it just now..."

A student couldn't help standing up to seek the truth, but halfway through the question, he couldn't continue to ask because he felt that Li Zexuan would definitely be the same as before.

Sure enough, Li Zexuan waved his hand and said, "Let's put this aside, and I will take you..."

"Be a little game!"

Before uttering the next few words, all the teachers and students helped Li Zexuan out in unison in the audience, and the voice was so hot, so hot and angry, Li Zexuan on the stage felt a strong resentment. Come on!

"Ahem! So you all know it!"

Li Zexuan sweated on his forehead and said awkwardly, then he took out two iron boxes and shouted to the side by the way: "Mo Zhong, Mo Yun, come here!"

The two brothers had already come down from the roof. Hearing that Li Zexuan had something else, they had to run over again.

"The two of you hold a box, pay attention to the wires in the middle, don't get too far apart from each other, or I can't spare you if the wires are torn off!"

"Yes, yes, the mountain is long!"

The two brothers quickly agreed, and one of them took a box.

"Now you two go and stand there!"

Li Zexuan pointed to the back corner of the auditorium and said.

The two brothers followed their words.

Everyone is unknown, but there are two exceptions, Li Tai and Cheng Chumo, because they have not only seen this thing before, but also played it.

Li Zexuan took out two more iron boxes (one contains a voltaic battery, and the other contains a telegraph). After the wires were connected, he raised his head and said, "The next little game will be more interesting. Now, have you ever thought that one day, two people thousands of miles apart can send messages to each other?"

Sun Zifan: "Send a letter!"

Wang Meng: "You can also pass the book on flying pigeons!"

Li Zexuan shook his head and said: "With a distance of thousands of miles, how long does it take to deliver the letter and the flying pigeon? The two things you see today can be transmitted thousands of miles apart in the future!"

"Wow~!"

"This....How is this possible?"

"Thousands of miles away, spread the message instantly, isn't this a fairy method?"

Everyone off the court was in an uproar again, saying that they were shocked more times today than in the past combined, and Li Zexuan was always shocking and dying!

"Due to the limited space, let's do a ten-foot-a-meter transmission experiment first! What kind of sound will the box on my side make, and what kind of sound will Mo Zhong's hand make!"

Li Zexuan opened the tin box and started sending the "telegram".

"DiDi! Di~! Di~! Di~!"

Two short and three long!

Almost at the same time, the iron box in Mo Zhong's hand also sounded "DiDi! Di~! Di~! Di~" two short and three long voices.

Although the students and teachers feel it is amazing, most people still don't understand it.

"Mountain Chang, just ringing, how do you send messages?"

A student stood up and asked.

"Hehe, good question! This classmate, carefully recall the voice you just heard. Is it long and short?"

The student condensed his eyebrows for a while, then replied: "Yes, Shan Chang!"

"Think about it again. If I combine these long and short sounds with each other, and different combinations correspond to a word, for example, the two short and three long sounds correspond to the word "Li", then can I pass Is this a letter?"

As soon as the voice fell, there were shouts of exclamation!

"Wow, why didn't I think of it? Shan Chang's method is really amazing!"

"I just don't know how far this thing can travel!"

At this time, Li Zexuan said again: "According to my preliminary test, with this thing, you can achieve mutual information within 30 miles! If you make a slight improvement in the future, it is not a dream to exchange information thousands of miles away!"

"Wow, more than thirty miles? That's amazing!"

"It's amazing! It's amazing! An iron box can spread letters for thousands of miles!"

The auditorium is boiling again!

The older generation of college gentlemen looked at each other in shock. At this moment, they really feel that they are old and can't keep up with the times!

"Well, this will be revealed for the time being, there will be a good show later! Mo Zhong, Mo Yun, please both of you to pack these things!"

Li Zexuan once again showed a fascinating smile and ordered.

It is impossible for him to explain the principle of the telegraph in detail now!

The students showed a "sure enough" expression~IndoMTL.com~ But now they are too lazy to complain, so they are silent and watch Li Zexuan's performance.

I saw Li Zexuan bring up a basin of water from under the lecture table, and then took out a box and two tubular colored glazes, then he looked at everyone and smiled: "The next moment is to witness the miracle, you I will see the real life out of nothing~!"

………………………

Pay off the previous debt, and strive to pay it this month!

In addition, let’s talk about rewarding and adding changes. This knight has never officially said it before. Today, I will only add five changes to the one-time reward for the leader. It’s not because the knight is playing big cards, the knight really has no cards. It's funny, mainly because the knights are now at work, and there is less free time. If you ask me to add 20 more, I can't add it. It is too tired after work every day. It is not easy to maintain two shifts a day. The main thing is to hope that everyone keeps the book currency to subscribe. It is already very happy to have subscribed knights, don't ask for rewards!

Thank you all book friends for your company along the way, and thank you for your subscription, I wish you happy every day!

(End of this chapter)