A solar stove is a device that uses solar radiation to collect heat from the sun to cook food. It did not burn any fuel and did not cause any pollution. As long as it was a sunny day, it was faster than a honeycomb coal stove when used normally. It was basically the same speed as the gas stoves of later generations.
The reason why the solar stove could gather light was that it used the reflection principle of a concave mirror to emit a large area of sunlight to a point. As a result, the temperature of this point would be hundreds of degrees higher. It could be used to boil water and cook food without any pressure.
There were many materials that could be used to make the solar stove, such as glass or steel. However, considering the durability and safety, Li An chose steel in the end. This way, the solar stove could theoretically be used for decades. As long as it wasn't damaged by humans and was properly maintained, it could be used forever.
Li Yu and Li Qiu had never seen a solar stove before. Of course, they did not understand the principle behind it, let alone its use. They could only humbly ask Ang Lee for advice.
"This solar stove is used to boil water and cook food. As long as there is sunlight, it can boil water and cook food without the use of firewood. It is very convenient and fast. The only drawback is that it can only be used with sunlight."
Ang Lee gave a simple introduction. He asked the craftsman to bring a small pot with a small amount of cold water and placed it on the stove.
"Gwangbyeong Of Gojoseon, Shiro, put your hands into the pot and test the temperature."
Ang Lee requested with a smile.
"Cold water, it's cold water."
Li Yu and Li Qiu tried it respectively and proved that it was cold water.
Ang Lee raised his head to look at the sunlight that had already set in the west. He said softly, "The sun is now setting in the west. The light is not too strong. The function of the solar stove is not very good yet. However, it can still heat up this pot of water without any pressure. Later, you will understand when you test the temperature."
"Can this thing really heat up cold water?"
Li Yu and Li Qiu were still somewhat doubtful. They walked back and forth around the solar stove and frowned as they analyzed the principle of the solar stove.
"Assistant Minister Li, this solar stove and magnifying glass seem to concentrate the sunlight on a point, but there are some differences."
Li Qiu carefully observed for a long time and came to a half-understood conclusion.
"Yes, Shiro has observed very carefully. Both of them are indeed using the same principle. However, the magnifying glass uses the principle of a convex lens, while the solar stove uses a concave mirror. Although they both gather light, the principle is slightly different. As long as they are used well, they can benefit the entire world."
Ang Lee said with relief. He was very happy that Li Qiu had learned to think independently.
"Assistant Minister Li, the pot is steaming."
Li Yu became excited.
"Well, the cold water has already been heated up. Do you still dare to put your hands in?"
Ang Lee said with a smile.
"Wow, it's hot."
How could Li Yu and Li Qiu be afraid of hot water? They stretched out their hands to test it, but immediately retracted their hands.
"Assistant Minister Li, it seems that this solar stove can really be used to cook and boil water! This way, we won't have to waste firewood and charcoal. This is really a good thing, a good thing that will benefit the people of the world. "
Li Yu praised and seemed very excited. Li Qiu also echoed.
"Good things naturally have to be presented to His Majesty. Why don't you accompany me to the palace at noon tomorrow and present the three things I recently invented to His Majesty?"
Ang Lee suggested.
"Of course, that's not a problem. However, other than the magnifying glass and the solar stove, what else is there?"
Li Yu asked curiously. He already knew that Ang Lee had presented the telescope to the imperial court, so the telescope definitely didn't count. In that case, there must be another rare thing to present to the emperor.
Ang Lee smiled and explained, "This thing is still in the debugging stage. It will definitely be invented before noon tomorrow. At that time, you and His Majesty will witness it together."
"Assistant Minister Li, can you reveal some information first?"
Li Yu asked curiously.
"Well, there's no harm in telling you. This is a mirror that can magnify objects by a thousand times. A strand of hair will look thicker than a finger. Isn't it amazing?"
Ang Lee smiled proudly and gave a simple introduction.
"A strand of hair looks thicker than a finger? So amazing? "
Li Yu and Li Qiu looked at each other and found it very interesting. Moreover, they very much hoped that they could soon see this mirror that could magnify objects by a thousand times.
"It's getting late. You should go back to the city! Wait for me at the gate of the Daming Palace before noon tomorrow. "
Ang Lee requested.
"Okay, Assistant Minister Li. See you at noon tomorrow."
Li Yu and Li Qiu agreed and returned to Chang 'an together.
"Alang, aren't you going back tonight?"
"Of course I'm going back. However, I don't want to go with the two of them. I'm afraid that they will annoy me."
Ang Lee explained. Then, he looked at Wang Ba and ordered, "Pack the solar stove, magnifying glass, and microscope immediately and prepare to transport them back to the mansion."
Obviously, the microscope had been made. However, Ang Lee did not want Li Yu and Li Qiu to see it at this moment. After all, it was already late. If the two of them were addicted to playing, it would definitely waste a lot of time.
The magnifying glass and microscope were very small and very easy to pack. However, the solar stove was relatively large. It needed to be disassembled first and then transported back. However, this way, it would be more troublesome to assemble it after returning. After hesitating for a moment, Ang Lee decided to spare a separate transport vehicle to transport the huge solar stove directly back.
At night, the solar stove could not be used. However, as long as there was light, the microscope could be used normally. Before Ang Lee took out the microscope, he made a bet with Yan Ruyu about whose hair was thicker.
"Husband, you're so strange tonight. Why do you want to compare the thickness of your hair? How can you compare when your hair is so small?"
Yan Ruyu rolled her eyes at Ang Lee.
"Your husband is so smart. Naturally, I have a way to distinguish the thickness of my hair. Moreover, my wife will be convinced wholeheartedly."
Ang Lee stated his domineering attitude.
"Alright then. If my husband can prove that your hair is as thick as jade, Ruyu will be at your disposal tonight."
Yan Ruyu smiled shyly. After being together for so long, her relationship with Ang Lee was very good. Moreover, she knew Ang Lee's preferences and what kind of words could make Ang Lee happy.
"Haha! You're the one who said it! "
Ang Lee smiled mischievously. He took out the newly developed microscope from behind him and placed it in front of Yan Ruyu.
"Dang dang, there's also this."
At the same time, Ang Lee took out a magnifying glass with a magnifying glass that could magnify 20 times.
"My wife, look carefully. This is the magnifying glass and this big one is the microscope. They are both magical tools that I have developed. Come, let me teach you how to use them."
Ang Lee straightened their hair and tried to get as close as possible. Then, he observed with the magnifying glass first. After observing for a while, he observed with the microscope.
When he observed with the magnifying glass, he could see that Ang Lee's hair was thicker, but it was not obvious enough. Under the microscope, Ang Lee's hair was obviously thicker than Yan Ruyu's hair. It could be seen very clearly. This made Yan Ruyu unable to deny it even if she wanted to.
"How is it? You lost, right? You'll be at my disposal tonight? Don't be shameless! "
Ang Lee smiled mischievously and looked at Yan Ruyu gloatingly.
"Ruyu is just a weak woman. My future life will depend on my husband. When did I not follow my husband's wishes? How could I dare to disobey you?"
Yan Ruyu had a pitiful expression, as if Ang Lee bullied her every day.
However, Ang Lee really seemed to bully her every day. There was no other way. Who asked Yan Ruyu to be his wife? If he didn't bully her, who would he bully?
And Yan Ruyu's pitiful expression made Ang Lee full of thoughts of bullying her. The more pitiful his wife was, the more he wanted to bully her. Was this enough to satisfy him?
Before going to sleep, needless to say, Ang Lee bullied Yan Ruyu. Of course, it was a gentle bullying. It was a bullying method that Yan Ruyu approved of in her heart.
The next morning, Ang Lee woke up very late. After all, the railway and the research and development center were on the right track. There was no need for him to inspect every day. Moreover, he was tired from the night and needed a good rest.
Before noon, Ang Lee lazily got up. After finishing his lunch, he led Zhao Liu and a group of male servants to the Daming Palace, surrounded by guards.
"Assistant Minister Li, we have been waiting for a long time."
Li Yu and Li Qiu came from behind the warhorse and threw away the last piece of cucumber.
However, the reason they were hiding from eating cucumbers was not to avoid being discovered by Li An, but to avoid certain one-track minded imperial censors from the imperial court. Those fellows seemed to have a natural inclination to offend people. No matter what your status was, as long as you made a small mistake, they would seriously impeach you to the emperor. Of course, eating in public was also within the scope of impeachment.
"What did you eat just now? It was the cucumber in my greenhouse, wasn't it? "
Although Li Yu and Li Qiu's actions were swift, Ang Lee could tell at a glance that the cucumber they threw away was the last piece of cucumber.
"Yes! In the entire Tang dynasty, except for Assistant Minister Li's greenhouse, there are no cucumbers in other places! "
Li Yu frowned. It was such a simple question. Was there a need to ask?
"Did you go out of the city again?"
"No, I asked the guards to pick some. There are five left. Assistant Minister Li, do you want to eat some? However, there are often imperial censors passing by here. You have to hide and eat secretly. "
Li Yu had an experienced look on his face.
"You are addicted to eating cucumbers. Fortunately, I planted dozens of mu of cucumbers. Otherwise, it wouldn't be enough for you."
Ang Lee joked. He waved his hand and led everyone into the Daming Palace. The Emperor had decreed that as long as Ang Lee wanted to send something in, he could let it go after a little inspection. He didn't need to wait for the order to let it go.
Today, there was only the Chang court. Therefore, several Prime Ministers who were appointed as Deputy Ministers of the Central Secretariat were in the Zichen Palace to discuss state affairs with Li Longji. Normally, the court wouldn't go on until this time. However, Li Longji hadn't gone to court for three days in a row. There was a backlog of things. Of course, it would take more time to deal with them. Moreover, Li Longji woke up late. The morning court was delayed by more than an hour.
After dealing with all the government affairs that had been backlogged for three days, Li Longji heaved a sigh of relief. Although he was more tired than usual, he felt refreshed after resting for several days.
"Everyone, Assistant Minister Li has brought some newly developed things into the palace. They will soon arrive at the Zichen Palace. Gwangbyeong Of Gojoseon and Prince Qing's Fourth Prince are also coming."
After hearing the report from the gate guards who had rushed over, Gao Lishi walked to Li Longji's side and informed him of the situation.
"Oh, Assistant Minister Li has developed new things again?"
Li Longji was surprised at first. Then, he happily said, "My beloved ministers, there is no need to rush back to work for the time being. Assistant Minister Li has brought new things. Accompany me to take a look. Every time this Assistant Minister Li brings something, I am extremely shocked. I wonder what good things it will be this time."
The Prime Ministers were also very curious. They all turned to look at the entrance of the Great Hall.
"Everyone, Assistant Minister Li has arrived."
"Let him in."
"Let Assistant Minister Li enter the Great Hall."
Ang Lee, Li Yu, and Li Qiu entered the Great Hall together. They brought in a magnifying glass and a microscope. The solar stove was left outside.
"Your humble subject, Ang Lee, pays his respects to Your Majesty."
"Your Majesty, Grandsons Li Yu and Li Qiu pay their respects to Your Majesty."
The three of them bowed together.
"Hahaha! You may rise. Assistant Minister Li, what useful things have you brought me today? "
Although Li Longji was old, he was also very curious. After all, every time Ang Lee came up with an invention, it would bring great shock to him. Of course, it would also bring great benefits to the Tang Empire.
"Your Majesty, your humble subject brought three things today. They are a magnifying glass, a microscope, and a solar stove."
Ang Lee introduced the three items and gave a rough description of the functions and characteristics of the three items.
Of course, it was not convincing to just talk about it without a demonstration. Ang Lee put the prepared hair strands on the table and let Li Longji personally observe the magnifying effect of the magnifying glass and the magic of the microscope.
"Assistant Minister Li, what are the specific uses of these two things?"
Li Longji was more concerned about the uses of Ang Lee's inventions.
"Your Majesty, the magnifying glass and the microscope can be used to identify the authenticity of jewelry, antiques, calligraphy, and paintings. In addition, they can also be used in medicine. Also, with this mirror, you can see a lot of things that you couldn't see before. It's convenient for people to have a better understanding of the world. Of course, it may be more useful in the future."
Ang Lee explained carefully.
"Oh, it's really a good thing!"
Li Longji picked up the magnifying glass and carefully observed his imperial robe.
Li Linfu and the other Prime Ministers also picked up the magnifying glass and the microscope respectively to observe the microscopic world. They were full of praise for Ang Lee's inventions.
"Assistant Minister Li, where is the solar stove?"
After admiring the magnifying glass and the microscope, Li Longji suddenly remembered that there was one more thing that he hadn't seen.
"Your Majesty, the solar stove is relatively large. Moreover, it can only be effective under strong sunlight. It can only be placed outside. Your humble subject earnestly requests Your Majesty to move outside the hall."
Ang Lee requested.
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