A solar cooker is a device that uses solar radiation to obtain heat through concentrating light to cook food. Pen & Fun & Pavilion www.biquge.info it does not burn any fuel; There is no pollution; As long as it is a sunny day, it is faster than a honeycomb coal stove in normal use; The speed of the gas stove is basically the same as that of later generations.

The reason why the solar cooker can concentrate light is that it uses the reflection principle of the concave mirror to emit a large area of sunlight to a point, so that the temperature of this point will be hundreds of degrees higher, and it can be used to boil water and cook without pressure.

There can be a variety of materials for making solar cookers, such as glass and steel, but considering durability and safety, Ang Lee finally chose steel materials, so that the solar cooker can theoretically be used for decades, as long as it is not man-made damage and good maintenance, it can be used forever.

Li Yu and Li Li had never seen a solar cooker, and of course they didn't understand the principle, let alone its use, so they had to humbly ask Li An for advice.

"This solar cooker is used to boil water and cook, as long as there is sunlight, you can boil water and cook, no need to use firewood, very convenient and fast, the only drawback, is that there must be sunlight to use."

Ang Lee gave a brief introduction and asked the craftsman to bring a small pot with a small amount of cold water and place it on top of the stove ring.

"King Guangping, Shiro, you put your hands in the pot and test the temperature."

Li Ang asked with a smile.

"Cold water, it's cold water."

Li Yu and Li Li tried it separately and proved that it was cold water.

Li An looked up at the sunlight that had sunk in the west, and said softly: "Now the sun has sunk a little west, the light is not too strong, and the function of the sun cooker is not well reflected, but there is no pressure to heat this pot of water, wait a while, you can try the temperature again and understand." ”

"Can this thing really boil cold water?"

Li Yu and Li Yu were still a little skeptical, walking back and forth around the solar cooker, and frowning to analyze the principle of the solar cooker.

"Li Shilang, this solar stove and a magnifying glass burn the ants, it seems that they both concentrate the sun's rays on one point, but they seem to be a little different."

Li Li carefully observed for a long time and came to a conclusion that he knew nothing about it.

"Well, Shiro observed very carefully, these two do use the same principle, however, the magnifying glass uses the principle of a convex lens, while the solar cooker is a concave mirror, although they are both concentrating light, but the principle is slightly different, as long as it is used well, it can benefit the whole world."

Li An said with relief that Li Li could learn to think independently, which made him very happy.

"Li Shilang, the pot is steaming."

Li Yu became excited.

"Well, the cold water is already hot, do you still dare to put your hands in it?"

Ang Lee said with a smile.

"Wow, it's hot."

How could Li Yu and Li Yu be afraid of the hot water, they reached out and tried it, and immediately retracted their hands.

"Li Shilang, it seems that this solar stove can really be used for cooking and boiling water! In this way, there is no need to consume firewood and charcoal, which is really a good thing, a good thing for the benefit of the people of the world. ”

Li Yu opened his mouth to praise, looking very excited, and Li Yu also followed suit.

"Good things, naturally I have to dedicate them to Your Majesty, or tomorrow at noon, you will accompany me into the palace and dedicate the three things I recently invented to Your Majesty."

Ang Lee suggested.

"Of course, there is no problem with this, but what is there besides a magnifying glass and a sun cooker?"

Li Yu asked curiously, he already knew about Li An's dedication of the telescope to the imperial court, so the telescope must not be counted, in this way, there must be another rare thing to be dedicated to the emperor.

Li An smiled and explained: "This kind of thing is still in the debugging stage for the time being, and it will definitely be invented before noon tomorrow, and when the time comes, you will witness it with Your Majesty." ”

"Li Shilang, can you reveal a little information first?"

Li Yu asked curiously.

"Well, it doesn't hurt to tell you, this is a mirror that can magnify objects a thousand times, a strand of hair, it looks thicker than a finger, isn't it amazing."

Ang Lee smiled proudly and briefly introduced.

"Hair looks thicker than a finger? So powerful? ”

Li Yu and Li Li looked at each other, thinking it was very interesting, and they very much hoped that they could soon see this mirror that could magnify objects a thousand times.

"It's getting late, go back to the city! Wait for me in front of Daming Palace before noon tomorrow. ”

Li An opened his mouth to ask.

"Okay, Li Shilang, then we'll see you tomorrow at noon."

Li Yu and Li Yu agreed and returned to Chang'an City together.

"Ah Lang, aren't you going back tonight?"

"Of course I want to go back, but I don't want to go with the two of them, for fear that they will bother me."

Li An explained, looked at Wang Ba and ordered: "Immediately pack the sun cooker, magnifying glass, and microscope and prepare to transport them back to the mansion." ”

Obviously, the microscope has already been made, but Li An doesn't want Li Yu and Li Li to see it at the moment, after all, it is getting late, and if the two of them are addicted to playing, they will definitely delay a lot of time.

The magnifying glass and microscope are very small, which is very easy to pack, but the solar cooker is relatively large, and it needs to be disassembled first, and then the parts are transported back, but in this way, after going back, it is more troublesome to assemble, after hesitating for a while, Li Ang decided to vacate a transport truck alone and transport the huge solar cooker back directly.

At night, the solar cooker cannot be used, but as long as there is light, the microscope can be used normally, and before Li An took out the microscope, he made a bet with Yan Ruyu on whose hair was thicker.

"Husband, you are so strange tonight, why is it thicker than your hair, your hair is so small, how can it come out."

Yan Ruyu glanced at Li An.

"As a husband is so smart, he naturally has a way to distinguish the thickness from the fine, and it will convince the lady."

Ang Lee's domineering statement.

"That's good, if Fujun can prove that his hair is as thick as jade, Ruyu will be at Fujun's disposal tonight."

Yan Ruyu smiled shyly, after getting along for so long, her relationship with Li An has been very good, and she knows Li An's preferences and what kind of words can make Li An happy.

"Haha! That's what you said! ”

Li An smiled evilly, took out the newly developed microscope from behind him, and placed it in front of Yan Ruyu.

"Bell, and this."

While taking out the microscope, Ang Lee took out a magnifying glass with twenty times the magnification power.

"Madam, look at it, this is a magnifying glass, this big man is a microscope, they are all artifacts developed for your husband, come, teach you to use it for your husband."

Ang Lee straightened their hair and brought them as close together as possible, and then, first with a magnifying glass, after some observation, then with a microscope.

When observing with a magnifying glass, it can already be seen that Ang Li's hair is thicker, but it is not obvious enough, and under the microscope, Ang Lee's hair is obviously much thicker than Yan Ruyu's hair, and it can be seen very clearly, which makes Yan Ruyu unable to deny it.

"Well, let's lose! What about leaving your husband at your disposal tonight? Don't play tricks! ”

Li An smiled evilly and looked at Yan Ruyu gloatingly.

"Ruyu is just a weak woman, and her future life will depend on her husband, how dare she disobey her husband's wishes."

Yan Ruyu had a pitiful expression, as if Li An was bullying her every day.

However, Ang Lee seems to really bully her every day, there is no way to do this, who made Yan Ruyu his wife? Don't bully her, bully whom,

And Yan Ruyu's pitiful expression made Li An full of thoughts about bullying her, the more pitiful her wife is, the more she wants to bully, so it's cool enough?

Before falling asleep, needless to say, Ang Lee bullied Yan Ruyu well, of course, it was gentle bullying, and it was a bullying method that Yan Ruyu recognized in her heart.

Early the next morning, Li An got up very late, after all, the railway and the R&D center were already on the right track, and he did not need to go to inspect every day, and he was tired all night, so he had to take a good rest.

Before noon, Li Ancai got up lazily, and after lunch, he took Zhao Liu and a group of male servants, surrounded by guards, and ran to the direction of Daming Palace.

"Li Shilang, we've been waiting for a long time."

Li Yu and Li Li walked around the back of the war horse and threw away the last cucumber they had eaten.

However, they hid and ate cucumbers, not to prevent being discovered by Ang Lee, but to hide from some tenacious imperial history of the imperial court, those guys seem to be born with a special desire to offend people, no matter what your identity is, as long as you do a little wrong, they can impeach the emperor in a matter, eat in public places, and of course it is also within the scope of impeachment.

"What did you just eat? It's a cucumber in my greenhouse, isn't it? ”

Although Li Yu and Li Li's movements were very quick, Li An could see at a glance that what they threw away just now was the last cut of cucumber.

"Yes! In the entire Tang Dynasty, except for Li Shilang's greenhouse, there are no cucumbers anywhere else! ”

Li Yu frowned and said, do you still need to say such a simple question?

"You're out of town again?"

"No, I asked the guards to pick some over, there are still five left, do you want to eat them? However, there are often imperial histories passing by here, so you have to hide and eat secretly. ”

Li Yu looked very experienced.

"You guys are addicted to eating, fortunately my cucumbers have been planted on dozens of acres, otherwise, it is really not enough for you to eat."

Li An made a joke, stretched out his hand, and led everyone into the Daming Palace, the emperor had already made a will, as long as Li An wanted to send things in, he could be released after a little inspection, and he didn't have to wait for the will to be released.

Today, there is only the Chang Dynasty, so several prime ministers who have been sealed with the Tongzhongshu Sect are in the Zichen Palace, discussing state affairs with Li Longji, and it is said that in normal times, the court will not proceed to this time, but Li Longji has not been to the court for three consecutive days, and there is a backlog of things, and it will of course take more time to deal with it, and Li Longji got up late, and the early dynasty was delayed by more than half an hour than usual.

After handling all the government affairs that had been backlogged for three days, Li Longji breathed a sigh of relief, although he was a little more tired than usual, but he had rested for many days in a row, and this feeling was still relatively refreshing.

"Everyone, Li Shilang has entered the palace with some newly developed things, and he will soon arrive at the Zichen Palace, and the four princes of the Guangping and Qing palaces will also follow."

After listening to the report of the guards at the city gate who came in a hurry, Gao Lishi walked to Li Longji's side and informed Li Longji of the situation.

"Oh, Li Shilang has developed something new?"

Li Longji was surprised at first, and then said happily: "You Aiqing don't have to rush back to work for the time being, Li Shilang has sent something new, you can accompany me to see it, this Li Shilang, every time he sends something, I am very shocked, this time, I don't know what kind of good thing it is." ”

Of course, several prime ministers were also very curious, and turned to look in the direction of the entrance of the main hall.

"Everyone, Li Shilang has arrived."

"Xuan."

"Xuan Li Shilang enters the hall."

Li An, Li Yu, and Li Li entered the main hall together, and brought in magnifying glasses and microscopes, while the sun cooker was left outside.

"Weichen Li An see Your Majesty."

"Grandsons Li Yu and Li Yu see Your Majesty."

Three people salute together.

"Hahaha! Flat body, Li Shilang, what did you bring to me today? ”

Although Li Longji is old, he is also very curious, after all, every time Li An makes an invention, it can bring him a huge shock, and of course, it can also bring great benefits to the Tang Empire.

"Your Majesty, Wechen brought three things today, which are a magnifying glass, a microscope and a sun cooker."

Li An opened his mouth to introduce, and specifically explained the functions and characteristics of the three items.

Of course, it is not convincing to just say that it is not demonstrated, Ang Lee put the hair that had been prepared long ago on the case, and asked Li Longji to personally observe the magnifying effect of the magnifying glass, as well as the magic of the microscope.

"Li Shilang, what is the specific use of these two things?"

Li Longji is more concerned about the role of Ang Lee's invention of such a thing.

"Your Majesty, magnifying glasses and microscopes can be used to identify the authenticity of jewelry, antiques, calligraphy and paintings, in addition, medicine can also be used, and with this mirror, you can see a lot of things that you can't see before, so that people can better understand the world, of course, maybe it will be more useful in the future."

Ang Lee explained carefully.

"Oh, that's a good thing!"

Li Longji picked up a magnifying glass, looked at his dragon robe, and observed it carefully.

Li Linfu and other prime ministers also picked up magnifying glasses and microscopes respectively to observe the microscopic world, and were amazed by Ang Lee's invention.

"Li Shilang, where is the sun cooker?"

After admiring the magnifying glass and microscope, Li Longji suddenly remembered that there was still a sun cooker that he had not seen.

"Your Majesty, the sun stove is relatively large, and it must be in strong sunlight to have an effect, so it can only be placed outside, Weichen implores His Majesty to move outside the palace."

Ang Lee pleaded.

"Ladies and gentlemen, let's go over and take a look at this good thing that can cook without firewood and charcoal."