Xueba, I beg you to go and escort him quickly!

Xu Heng picked up the pen and paper and wrote while talking.

"The fish swimming at point T1 passes through a refraction surface to form an image, as shown in the figure. The light emitted from point T1 at an angle r=∠AT1O, the incident angle in water at point A is r, and the refraction in air The angle is n..."

"..."

Xu Heng wrote and drew, and continued, "For water, the magnification rate is 2!"

"Taking the line segment corresponding to the velocity V as the object, it is located at a distance of 2R in front of the plane mirror at E, and it forms a virtual image of the same size as the object at T2 behind the mirror at a distance of 2R. T2..."

"..."

"Synthesizing the above conclusions, if the fish moves upwards with the speed V, then the virtual image of the fish moves upwards with the speed 2V, while the real image of the fish moves downwards with the speed (2/3) V..."

When Xu Heng said this, Fang Zhonggui was very excited.

He glanced at Xu Heng's question that the crowd was discussing, and at the same time, he was sweating for himself.

The reason why he chose this question is because there is a huge misunderstanding here, and an important reason that will be ignored by candidates, that is, theoretical and non-theoretical!

This question was completely destroyed in the international physics competition at that time!

No one can give a completely correct solution process.

Therefore, Fang Zhonggui prepared Xu Heng's question with two hands!

When Xu Heng answered here, he became excited, because he knew that he could correct Xu Heng's mistakes and delay for a longer time, but Xu Heng never gave him a chance...

Xu Heng's words did not stop, and continued, "It is 3/8 times the original speed, but we still have to consider..."

PS: Thank you [tail number 6825] for your support! .

Chapter 339

"Theoretically we know how the object moves, but when the observer performs this experiment, what phenomenon will he see?"

Xu Heng didn't stop at all, and said everything.

"The speeds of the two images correspond to the real speed of the fish, as read on the scale, and in fact two opposite speeds are observed, one of which is three times the other, and one which resembles the other Triple the image."

"We should look at it from a distance, because we want to see a distant image behind the fish tank at the same time."

"The distance R between two images."

"Observe with your eyes..."

"..."

"As long as you observe far enough, despite the distance difference, what you see..."

"..."

"The general formula for the ratio of the relative velocities of two images to the original velocities of objects is..."

Xu Heng wrote:

[2n/（2-n）]*[（k-1）（n-1）]/[2k（n-1）-n]

Xu Heng, "Use a cylindrical glass tank full of water, on one side..."

"..."

When Xu Heng finished speaking, Fang Zhonggui opened his mouth wide, not knowing what to say.

He was stunned!

At this moment, his mind was blank.

Xu Heng, "???"

"Professor Fang, are you okay? Am I... wrong? Or..."

wrong?

How could it be wrong!

What you Xu Heng gave is the best answer!

And all correct!

You perfectly explained the theoretical situation combined with the actual situation!

Fang Zhonggui still underestimated Xu Heng's strength.

clap la la...

Fang Zhonggui's scalp was numb.

This time he was completely shocked!

From the very beginning of contact, to refreshing his understanding of Xu Heng step by step, to this time, with the 360-degree shock, Fang Zhonggui completely gave up struggling.

He stayed where he was, stunned.

Xu Heng frowned, stepped forward and yelled several times, and Fang Zhonggui came back to his senses.

Xu Heng, "Professor Fang, are you okay? Professor Fang? Professor Fang?"

"Professor Fang, is my idea of ​​solving the problem correct?"

Fang Zhonggui, "Pfft... Xu Heng, what nonsense are you talking about! You are obviously right! Do you still need to ask me?"

"You're clearly trying to frustrate me!"

Xu Heng, "Uh..."

So embarrassing!

Xu Heng withdrew his gaze and looked in the direction of the blackboard. He saw a group of professors still writing and drawing there. They still didn't have an accurate idea about the question that Xu Heng asked before.

Xu Heng frowned, "Why bother?"

Seeing that his thoughts were shattered, Fang Zhonggui also told Xu Heng the truth.

"Hey... I wanted to give you a very difficult question with a lot of misleading traps, but you were lucky enough to avoid all the traps and pitfalls, and finally gave the most accurate and correct answer!"

"The time I bought for them is a drop in the bucket!"

"They're just plain stupid!"

Xu Heng smiled, "Professor Fang, thank you."

Fang Zhonggui's heart trembled. He was about to refute, even puzzled, but the next second, he was relieved.

Yes!

His purpose is for Xu Heng's sake, to preserve Xu Heng.

But Xu Heng is only in his teens now, if he tried to persuade him with kind words, it would only backfire, so he had no choice but to do so.

But never expected that Xu Heng would understand.

"hiss……!"

Fang Zhonggui gasped, and he looked at Xu Heng in surprise.

good grades!

Sophisticated and knowledgable!

How is this still a person!

I'm afraid it's not a person's essence!

Now that Xu Heng understands everything, Fang Zhonggui has nothing to say.

He watched Xu Heng walk forward slowly, and raised the blackboard eraser amidst the chatter of the crowd.

Professors and teachers, "???"

Xu Heng raised the blackboard eraser.

"Shh-"

In front of this group of people, he erased the question he asked before!

Professors and teachers, "!!!"

"Student Xu Heng, what do you mean?"

Xu Heng smiled, "Everyone, don't let this question delay everyone's enthusiasm for the question~!"

In a word!

It made many professors and teachers present feel ashamed.

At the same time, Xu Heng was also waking them up.

You are not here to make questions!

It's here to ask questions!

After erasing the question, Xu Heng put down the blackboard eraser and left.

He is not going to ask questions!

At least now he won't ask questions!

Fang Zhonggui has worked so hard, so Xu Heng should give him some face!

Besides, it's not as easy as playing chess when you come up with a question!

Under the attention of the professors and teachers, Xu Heng asked Fang Zhonggui, "Professor Fang, can you play chess?"

Fang Zhonggui smiled, "I can find chess pieces! Just wait a moment!"

These two people really dare to play chess in the examination paper group!

Among them, a professor couldn't stand it anymore, and stomped his feet angrily, "Nonsense! It's just nonsense!"

"What does he mean? Is he looking down on people, or what?"

"Student Xu Heng, aren't you too..."

"..."

They really couldn't stand Xu Heng's behavior.

They were furious!

"Hehe! Seeing is worth seeing! Xu Heng, I didn't expect you to be such a student!"

"Hey……!!!"

When Fang Zhonggui came back with a chess set, he heard some professors say this, and he retorted, "Xu Heng, who was scolded by you, the Russell University Group is doing everything possible to dig it up!"

In a word!

The faces of these professors and teachers turned red, and they couldn't hold back a word for a long time.

"!!!"

Fang Zhonggui's words can be said to be murderous.

After being completely conquered by Xu Heng's strength, Fang Zhonggui no longer struggled.

He is now Xu Heng's "partner"!

Those professors, "!!!"

Fang Zhonggui ignored these people, and played chess with Xu Heng in front of these people.

"Let's go! Student Xu Heng, it's your turn!"

The group of professors in the examination group were all ignored!

Especially those professors who had some complaints in their hearts, they gritted their teeth one by one.

The sound of teeth grinding up and down, they can clearly hear it themselves!

Xu Heng and Fang Zhonggui, you come and go, game after game.

While playing chess, they prepared paper and pens and discussed with each other.

"Student Xu Heng, I am now a general."