The whole network was shocked!You call this a psychiatrist?

Chapter 343 Optical Principles and Clamping Wall Mechanisms
"Don't be afraid, the woman on the wall is not a ghost, it's just a painting."

Chen Yu said casually: "If you don't believe me, go and see for yourself."

When Chen Yu said that the woman on the wall turned out to be a painting, Hu Liang suddenly felt incredible.

"It seems to be really a wall painting..."

Out of trust in Chen Yu, Zhou Kexin bravely moved to the wall cautiously.

Muttering something, he reached out and touched the figure on the wall twice.

Hearing this, Hu Liang and Pan Yueling also became courageous.

Follow the past and touch this wall painting.

After a while, the two looked at each other.

It turned out to be a wall painting.

"Doctor Chen, did this painting use some kind of special technique to hide it on the wall?"

Zhou Kexin quickly sorted out the problem that happened in front of her.

The walls are bare and the overall color is white.

Obviously there was nothing there, so Chen Yu poured water on it, and a painting appeared immediately.

It reminds me of a spy movie I watched before, which also has the same content.

Empty white paper, if you smear some liquid on it, the handwriting will appear.

Chen Yu pointed to the wall in front of him and said, "The painting on the wall is made of common paint, and there is nothing unusual about it."

"What's really interesting is the other thing that's used to cover it up."

"what?"

Hu Liang asked.

"lime."

Chen Yu didn't write any ink, and solved the mystery directly.

There is nothing special about the paints used in wall paintings.

The reason why people can't see the painting above is that a layer of lime water is applied to the surface of the painting.

"Once the lime water sets, it will cover the wall painting."

"If lime water meets water, it will produce a certain chemical effect, and the painting will be revealed."

"After the water dries, the walls turn white again."

"Recovered by the solidified lime water, the wall paintings will naturally be invisible."

Chen Yu smiled lightly and said, "Mr. Hu, Ms. Pan, you should know the principles of optics, right?"

The two nodded in unison.

Chen Yu said: "The appearance of the seemingly mysterious wall paintings is actually a very simple optical principle."

"Lime particles have a lot of voids, and once water molecules fill the voids between the particles, the surface lime is equivalent to turning into glass."

"The refraction changes so that light is able to refract through the water and lime mixture."

"In this way, the wall paintings can also be clearly displayed."

Having said that, Chen Yu glanced at Zhou Kexin who was hesitant to speak.

"The way limewater covers the wall paintings has some similarities with the spy movie intelligence security method you think of."

Zhou Kexin was surprised when he heard this.

I am sure that Chen Yu can not only predict the future, but also read minds.

"Is this science or metaphysics?"

Pan Yueling asked her boyfriend Hu Liang.

"Is it science?"

Hu Liang was not sure.

The haunting of the old house began a few years after the death of the poor girl.

Calculated according to the time, the Qing Dynasty had just perished at that time.

If Chen Yu didn't fool them, lime water can cover up wall paintings, which is an optical principle.

Not only to involve physics, but also to understand some chemical principles.

Late Qing and early Republic of China, physics, chemistry.

How come the combination of three words is so inconsistent?
"No, no, haunting is haunting, it has nothing to do with science!"

Uncle Jiang said suddenly: "Think about it, during the time you live here, do you often hear ghosts screaming?"

As soon as these words came out, Hu Liang and Pan Yueling became a little scared again.

"Doctor Chen, if the female ghost we saw is actually this wall painting."

"And what about the ghost screams we heard?"

Hu Liang immediately told a detail.

After hearing the strange sound, he and his girlfriend were only dubious about whether it was haunted.

They installed a lot of monitoring inside and outside the house.

Make sure that there is no one nearby when the strange cry occurs.

Hearing this, Chen Yu walked towards the potted plants on the ground not far away.

Take out a small pebble from it.

Go to the east wall and hit the wall with the cobblestone.

As the pebbles hit the wall, there was a "dong dong dong" sound from inside the wall.

"Hollow wall?!"

Hu Liang's expression changed.

If it is a solid wall, there is no possibility of this sound.

Pan Yueling also heard something wrong with the sound on the wall.

Also pick up a pebble and hit the wall.

The wall is hollow from top to bottom, front to back.

"As you can imagine, this wall is actually a sandwich wall."

Chen Yu bent down and reached out to buckle the blue bricks under the wall.

In a blink of an eye, many pieces of the blue bricks under the wall were seized by Chen Yu.

The resulting gap is big enough for a person to climb in.

Afterwards, Chen Yu bent down and climbed in.

When he came out again, he had an extra mini speaker in his hand.

"The ghost screams you hear come from this Bluetooth speaker."

Chen Yu casually threw the mini stereo to Hu Liang.

The mini stereo is about [-]% to [-]% new. It seems that I bought it not long ago.

Hu Liang and Pan Yueling were so angry that their lungs were going to explode.

It turned out that the strange noise came from this thing.

Uncle Jiang looked at Chen Yu in shock, and then an imperceptible strangeness flashed across his face.

Out of the corner of Zhou Kexin's eyes, she caught a glimpse of Uncle Jiang's strange expression.

Looked at the mini stereo, looked at the gap under the wall.

"Doctor Chen, in fact, there are no ghosts here at all. Someone deliberately pretended to be a ghost to scare people, right?"

At this moment, Zhou Kexin had an idea in his heart.

"I said before that there are no ghosts in this world, and no supernatural events have ever happened here."

"This sandwich wall was repaired together with this old house, and the purpose is to save life and prevent bandits from coming to burn, kill and loot."

Chen Yu was not busy answering Zhou Kexin's question, but instead talked about the origin of the sandwich wall in a leisurely manner.

The rich and powerful families in the feudal era usually built some life-saving organs at home.

Or a secret room tunnel, or a sandwich wall, or a hidden door.

There are many skilled craftsmen in ancient times, and it is difficult for ordinary people to find the secret chambers, tunnels and sandwich walls built by them.

"Open the partition wall and put a mini speaker inside."

"No matter how much surveillance you install, it is impossible to know the truth."

Hu Liang and Pan Yueling nodded heavily.

Not to mention finding out, the two didn't think about it at all.

"Uncle Jiang, do you think I'm right?"

Chen Yu smiled and looked at Uncle Jiang who said nothing.

Hearing these words, Hu Liang and Zhou Kexin looked at Uncle Jiang in unison.

Uncle Jiang trembled, and the muscles on his face visibly trembled unnaturally.

"Uncle Jiang, we have no grievances or enmities, why do you want to do this to us?"

Hu Liang asked angrily.

If Uncle Jiang hadn't done anything wrong, why would he be shaking with such an unnatural expression?

Obviously a guilty conscience.

"Young man, don't listen to his nonsense."

"I am so old, how could I harm you!"

Uncle Jiang defended himself without thinking.

(End of this chapter)