"Don't be afraid, the woman on the wall is not a ghost, it's just a painting."

Chen Yu said lightly: "If you don't believe it, you can go over and see for yourself." ”

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

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

Out of trust in Chen Yu, Zhou Kexin was bold and cautiously moved to the wall.

With words in his mouth, he reached out and touched the figure on the wall twice.

Hearing this, Hu Liang and Pan Yueling also had the courage to do so.

Follow the past and touch this mural.

After a moment, the two looked at each other.

It turned out to be really a wall painting.

"Dr. Chen, is there some special process for this painting to be hidden on the wall?"

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

The walls are bare, and the overall color is white.

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

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

Empty white paper, smeared with some liquid, can reveal the handwriting.

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

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

"What's that?"

Hu Liang asked.

"Lime."

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

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

The reason why people can't see the painting on it is because the surface of the painting is smeared with a layer of lime water.

"Once the lime water solidifies, it obscures the wall painting."

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

"When the water dried, the walls turned white again."

"When the lime water is re-covered with solidified lime water, the wall paintings are naturally no longer visible."

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

The two nodded in unison.

Chen Yu said: "The appearance of the wall painting that looks mysterious and mysterious is actually a very simple optical principle. ”

"There are a lot of voids in the lime particles, and once the water molecules fill the voids between the particles, the surface lime becomes glass."

"The refraction changes, and the light is able to refract through a mixture of water and lime."

"In this way, the wall painting can also be clearly visible."

Speaking of this, Chen Yu glanced at Zhou Kexin, who wanted to speak and stopped.

"The way the lime water covers the wall paintings has some similarities with the secret tactics of spy war films."

Zhou Kexin was shocked when she heard this.

It is certain that Chen Yu can not only predict the prophet, but also read minds.

"Is this science or metaphysics?"

Pan Yueling asked her boyfriend Hu Liang.

"It's science, right?"

Hu Liang is not sure.

The haunting of the old mansion began a few years after the death of the miserable girl.

According to the time calculation, the Qing Dynasty had just fallen at that time.

If Chen Yu didn't fool them, lime water has the ability to cover the wall paintings, which belongs to the optical principle.

Not only does it involve physics, but you also need to understand some chemical principles.

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

When the three words are matched together, why is it so inconsistent?

"No, no, no, a haunted is a haunted, and it has nothing to do with science!"

Uncle Jiang said suddenly: "Think about it, during the time you lived here, did you often hear ghost screams?" ”

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

"Dr. Chen, if we say that the female ghost we see, it is actually this wall painting."

"And what about the ghost screams we heard?"

Hu Liang immediately told a detail.

After hearing the strange noise, he and his girlfriend were only half-convinced about whether it was haunted.

They have installed a lot of surveillance inside and outside the house.

It was determined that no one was nearby at the time of the strange scream.

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

Take out a small pebble from it.

Come to the east wall and use pebbles to tap on the wall.

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

"Hollow wall?!"

Hu Liang's face changed.

If it was a solid wall, it would not be possible to have this sound.

Pan Yueling also heard that the sound of the wall was wrong.

Pick up a pebble and hit the wall with it.

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

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

Chen Yu bent down and reached for the green brick under the wall.

In the blink of an eye, many of the green bricks under the wall were deducted by Chen Yu.

The resulting gap is enough for a person to climb into.

Then, Chen Yu bent down and climbed in.

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

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

Chen Yu casually threw the mini speaker to Hu Liang.

The mini stereo is about eighty or ninety percent new, and it seems that it hasn't been long since I bought it.

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

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

Uncle Jiang looked at Chen Yu with a shocked gaze, and then a touch of imperceptible strangeness flashed on his face.

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

Looked at the mini stereo and looked at the notch under the wall.

"Dr. Chen, in fact, there is no haunting here, someone is deliberately pretending to be a ghost to scare people, right?"

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

"As I said, there are no ghosts in this world, and there have never been any supernatural events here."

"This sandwich wall was repaired together with this old mansion to save lives and prevent bandits and bandits from coming to burn and loot."

Chen Yu was not busy answering Zhou Kexin's inquiry, but talked about the origin of the wall unhurriedly.

The wealthy families in the feudal era generally built some life-saving mechanisms at home.

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

In ancient times, there were many skilled craftsmen, and the secret room tunnels built by them were sandwiched between the walls, which were difficult for ordinary people to find.

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

"No matter how much surveillance you put in place, you won't be able to learn the truth."

Hu Liang and Pan Yueling lowered their heads.

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

"Uncle Jiang, are you saying that I am right?"

Chen Yu smiled and looked at Uncle Jiang who was speechless.

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

Uncle Jiang's body trembled, and the muscles on his face trembled unnaturally.

"Uncle Jiang, we have no grievances or hatreds, why do you want to harm us so much?"

Hu Liang asked angrily.

If Uncle Jiang didn't do anything wrong, why did his body tremble and his expression was so unnatural?

It is obviously a sign of weakness of heart.

"Don't listen to his nonsense, young man."

"I'm such an old person, how can I harm you!"

Uncle Jiang defended himself without thinking.

(End of chapter)