A scholar of Zhenguan in the Tang Dynasty

"Who has a big neck disease? I'll go and see for myself as a teacher. Your kid's medical skills are half-baked. What if the cure turns out to be good or bad?"

"No one suffers from the big neck disease, it's just me that helps." Gu Qing walked into Sun Simiao's prescription and searched for it, "Master, where is the kelp you mentioned?"

"Get out." Sun Simiao watched Gu Qing messing around in his pharmacy, and took out a pack of herbs, "This is kombu."

After taking the kombu, Gu Qing accepted it with a smile, "Thank you, master, it really doesn't take much effort to get it without looking for it, and the camera can do it."

Sun Simiao was lost in thought, what exactly is a camera.

Back in his laboratory, Gu Qing got busy again. He burnt kombu into ashes and soaked it in water, and began to try to extract iodine. If you have knowledge, you are not afraid to travel all over the world. The teacher teaches well, and reading can finally come in handy.

The next step is to put this silver-plated copper plate in iodine solution to make silver iodide from the silver on it.

After making everything, Gu Qing excitedly put it into the camera obscura and began experimenting with imaging, starting with the landscape.

Li Zhi looked at it strangely, "You can just leave this camera obscura?"

"Yes!" Gu Qing nodded, "I will surprise His Royal Highness King Jin at that time, the mystery of knowledge and the greatness of science."

"Science? It's science again." Li Zhi watched something in the dark box, "Can I have a look?"

"Let's see." Gu Qing pulled Li Zhi into the camera obscura at half a person's height.

Entering the black lacquered camera obscura, Li Zhi saw a small hole, and the light and shadow in the small hole shone on the silver-plated copper plate, and said in surprise, "Gu Qing, why is this upside down?"

"It's really upside down, it's because of the light." Gu Qing explained, "It should be fine, His Royal Highness Jin Wang, please make way."

"All right."

Gu Qing closed the lid of the small hole, pushed the camera obscura back home and began to develop the photos.

Li Zhi has been standing outside the laboratory, Gu Qing closed the doors and windows, and walked into the room after some hesitation as to what kind of shady secret it was.

Seeing Li Zhi coming in, Gu Qing hurriedly said, "His Royal Highness, please close the door."

Carefully closing the door, Li Zhi watched Gu Qing washing things, "What are you washing this board for?"

"This water is dissolved with salt." Gu Qing said, "There is something called sodium chloride in the salt, which can help fix the image."

"What is a fixed image?" Li Zhi was puzzled again.

"It's the shadow, the shadow cast on this board." Gu Qing explained with a smile, "His Royal Highness just saw it too, the reflections of those scenery reflected on this board through the small holes, right?"

Li Zhi worked harder.

"That's right." Gu Qing continued to explain, "We want to leave the shadows of those trees on the board, but unfortunately there is no film, it would save a lot of trouble."

"What is film?" Li Zhi asked again.

"This is a long story, and it's hard for me to explain it to His Royal Highness King Jin." Gu Qing said flatly, washed the washed bottom board, and then dried it.

After everything was finished, Li Zhi stared at the silver plate for a long time speechless, as if in a daze, he came to the place where Gu Qing was formed. The trees, flowers and plants were exactly the same, even people in the distance.

"How is it? Isn't it amazing?" Gu Qing looked at Li Zhi's expression and said.

"Is this also magic?"

"This is not magic, this is called science." Gu Qing put away the silver plate and said to Fan Jian, "Call the whole family, let's take a picture together."

"Okay." Fan Jian also smiled and nodded.

The whole family sat in front of the house, with a row of chairs lined up, Sun Simiao said coyly, "I'll just stand by the side, Gu Qing, sit in the middle."

"Master, sit in the middle." Gu Qing said with a smile.

Yang Sheng and Di Renjie also came, but they couldn't figure out what Gu Qing was doing.

"Stand here." Gu Qing directed the seats.

Sun Simiao sat in the middle with two children in his arms, and Gu Qing said to Fan Jian, "Remember, when the image on it no longer shakes, it's fine, and then close the lid immediately."

"Understood." Fan Jian nodded vigorously.

Gu Qing sat beside Sun Simiao, Wu Mei sat beside her, Yang Sheng Di Renjie, Li Zhi and Xiao Sizi sat on the other side.

After sitting for about 10 minutes, Fan Jian closed the lid, "Patriarch, is this enough?"

"Let me see." Gu Qing walked into the camera obscura and looked at the situation of the bottom board. Only the upper body of the family was printed on the board, and everyone's expressions were clearly displayed inside. Sun Simiao's surprise, Wu Mei's curiosity, Yang Sheng's Lazy, Di Renjie was thinking.

Holding the bottom plate, Gu Qing came to his laboratory again to start fixing.

"What are you doing, teacher?" Di Renjie asked curiously.

"This is called taking pictures." Li Zhi raised his head and said to Di Renjie, "You don't know about taking pictures, let me tell you that Gu Qing only taught me this time, ha ha!"

Di Renjie walked into the camera obscura to take a look at the situation inside, and then looked at one of the small holes, "The secret should be in this small hole."

"That's right!" Li Zhi said proudly, "This is called optical imaging, do you know about optical imaging?"

"Does His Royal Highness King Jin know?" Di Renjie asked back.

"I..." Li Zhi was speechless for a while, "I want to know, but Gu Qing didn't tell me."

"Oh, so that's the case." Di Renjie nodded knowingly, "It turns out that His Royal Highness King Jin doesn't understand either."

"I will understand sooner or later." Li Zhi said unconvinced.

After the image on the board was clear, Gu Qing framed the bottom board, like a picture frame, and hung it carefully in the lobby of his home.

Sun Simiao was startled when he saw his own face on the floor. Everyone was clearly visible on the table-sized floor, and the facial features seemed to be frozen.

"This..." Sun Simiao was too scared to speak, "Is this me?"

"Hmm! It's the master." Gu Qing said proudly, "How about it, you disciple must be very capable."

"How did you do it? What kind of spell is this?" Sun Simiao stared at Gu Qing as if he was looking at a monster, forgetting about the usual weird things, but this time he left all the images of people behind. It's appalling.

()

Chapter 573

"This is not called magic, this is called science!" Gu Qing explained, "It is what our academy teaches, such as physics."

"Science." Sun Simiao looked at his expression and was speechless for a long time.

"This is Mingda." Xiao Sizi pointed to himself on the floor and said, "This is Sister Wu Mei, this is Brother Gu Qing, this is Brother Di Renjie, this is Brother Huang, and Brother Yang."

Wu Mei didn't have much reaction to this thing.The photos of the family were hung on the wall of the lobby, but it felt warm. For a while, I understood the reason why Gu Qing did this, and for a while, my eyes were a little sour. In the future, there will not be only one name on the spirit card.