The audience was boiling.

"What's going on? How did Gengar become a black bear? ”

"Is it my eyes?"

"Why is this happening?"

"What the hell is going on?"

Everyone was shocked to find that the black bear that was originally standing had become Li Ran with a single sword scabbard.

"Sword!" A crisp sword roar rang out.

This time, rampant emotions were heard in it.

Li Ran looked at the stunned referee, "It's time to pronounce the verdict." ”

The referee rubbed his eyes, looked at the bewildered Circle Bear and the outright Black Bear player, and then stumbled and announced, "Geng Ghost player wins." ”

"Hiss~~ This, I didn't understand the game, why did the Geng Ghost player and the Black Bear player suddenly swap?" The narrator looked puzzled.

The same goes for the audience.

"This ......" Professor Zhang thought for a long time, and suddenly slammed the table.

"I see, I see!" Professor Zhang suddenly exclaimed.

"Yo? What is Professor Zhang's insight? The narrator was in good spirits.

This is where the role of a special guest comes into play.

Special guests can often use what they have learned to explain the points that most of the audience are confused about.

"Watch your play." The narrator gave Professor Zhang a look.

"I'm going to see if the dog can spit out ivory." Li Ran's fans are waiting to see.

Professor Zhang has always been very optimistic about Li Ran.

was slapped in the face again and again, but he never got tired of it.

Putting that aside, Professor Zhang's own qualifications are pretty good.

Distinguished Professor of Elves, Huaxia First University.

It's impossible without two brushes.

Even Li Ran, who had already taken a break, couldn't help but look at the screen, wanting to see how Professor Zhang analyzed the principle of the single sword sheath mirror flower water moon.

Professor Zhang cleared his throat and said slowly: "First of all, let's take it literally. ”

"The flowers in the mirror, the moon in the mirror, the moon in the water, look beautiful, but they are all ethereal. They are all virtual images formed by the reflection of light in a flat mirror. ”

"The principle is that the image of the moon is reflected through the water and the flowers into the human eye through the reflection of the mirror, and the human eye looks at the water and the flower in the image of them according to the extension line of the reflected light."

"I believe everyone is basically a little surprised by this."

"I'm going to talk about a mirage here."

"In the desert, people sometimes see the oasis, and they are hungry and thirsty and rush towards the oasis with all their strength, but no matter how wild they run, the distance between them and the oasis never decreases, and in the end, they die in the desert because of lack of water."

"In summer, the desert is prone to mirage, because the scorching sun is on the head during the day, the sand is scorched, because the specific heat capacity of the sand is small, the temperature rises very quickly, the temperature of the lower layer near the sand rises very high, and the temperature of the upper layer of air is still very low, so that the abnormal distribution of air temperature is formed, due to thermal expansion and cold contraction, the density of the lower layer of hot air close to the sand is small, and the density of the upper layer of cold air is large."

"In this way, the refractive index of the air is small in the lower layer and large in the upper layer, when the light reflected by the higher objects in the distance is constantly refracted when it enters the denser air in the lower layer from the denser air in the upper layer and enters the sparse air in the lower layer, and its incident angle gradually increases, and total reflection occurs when it increases to an equal critical angle."

"And we humans rely on sight for 80 to 90 percent of our senses. The objects that our eyes can see are images that have been refracted by different media, which means that when the brain processes this large and complex image data, it is likely to lose some of the data, which will cause the image you see to be distorted or even false."

After a series of popular science by Professor Zhang, the audience seems to understand whether they understand or not.

"So, Professor Zhang, do you mean that the single scabbard uses the reflection of optics to make us hallucinate?" The narrator couldn't help but interject.

Professor Zhang shook his head and said mysteriously, "Yes and no. ”

When everyone was puzzled, Professor Zhang explained: "If you just rely on optics alone, you will definitely not be able to explain this, after all, the audience in the live broadcast room has also seen illusions." ”

Everyone nodded thoughtfully.

"So, first of all, I'm going to popularize the science you see, feel the senses of an object."

"Human beings have five senses, and the five senses are: shape, sound, smell, taste, and touch, that is, the five sense organs of human beings: sight, hearing, smell, taste, and touch."

"As I said before, our vision is biased because of optics, but optics alone is certainly not enough to explain the production of hallucinations, so I will mention sound here." Professor Zhang's explanation was very detailed, just like in class.

"Sound?" The commentary was strange, "But the sheath doesn't seem to have been issued, isn't it!" The commentary was shocked.

He let out the constant sound of the sword from the sheath of the lone sword.

"Not bad." Professor Zhang nodded with satisfaction, with a teachable look on his face.

"Sound is produced by the vibration of an object. It can be transmitted through a medium. ”

"In other words, sound is produced by different vibrational frequencies."

"Therefore, sound in general always contains a certain frequency range. The frequency range of sounds that can be heard by the human ear is between 20 and 20,000 hertz. Fluctuations above this range are called ultrasound, while those below this range are called infrasound. Animals such as dogs and bats can hear sounds up to 160,000 hertz. ”

"And the sheath of the lone sword is likely to emit sound waves other than the sound of the sword, which we can't hear, but they have an effect on us."

"Under the influence of sound and sight, we all hallucinate." After Professor Zhang finished speaking, he breathed a sigh of relief.

There was a look of pride in his eyes.

This is the expertise of a distinguished professor at one of the best universities in Guandu.

Everyone was impressed.

"It's worthy of Professor Zhang, this time I really have a lot of knowledge." The commentary was convincing.

The barrage also brushed up the full screen of 666.

Professor Zhang smiled slightly and said: "I have to say that Geng Ghost players are really good at training elves, whether it is Ghost Stone, Mystery Q or Snow Demon Girl, they have all trained a new idea, I believe that after this game, the trainers will study a new genre, Illusion Flow." ”

"This time, Geng Ghost won the game cleanly again, Professor Zhang, you made a mistake in your prediction again, how do you feel?" The narrator asked, with a wicked smile on his face.

"Ahem! cough cough. Professor Zhang suddenly coughed violently.

The sudden attack of the commentary made him a little at a loss.

He sorted out his thoughts and said: "I have to say that the new elves of the Geng Ghost players do occupy the advantage of unknown information, although the ability of Jinghua Shuiyue is strong, it is not difficult to restrain it, I believe that the journey of the Geng Ghost players will be more difficult in the future." ”

"Okay, thank you, Professor Zhang, then we'll see you next time."

The applause rang out, and the 90-story game of the wild fighting competition ended.