Who has jokes about high tech or something?

A tailor who can't cook is not a good driver.

The principle of laser, in short, is the stimulated radiation amplification of light, responsible for the process of synchronous transition of the atoms excited by the pump light under the excitation of the seed light source to achieve the complex amplification of the seed light, and then responsible for the principle of laser in the university is a whole book, is a whole course, it is to be completed in one semester, I recommend you to read "Laser Principle", which explains in detail the causes of laser, laser gain, loss, transverse mode, longitudinal mode, mode competition, laser classification, resonator, Laser propagation matrix, laser output, laser beam shape, and much more!

In medicine, laser treatment is now used more is cutting, using a high-energy laser to cut something from the body, so that the wound surface is small, the speed is fast, and the effect is good. There are also some more advanced ones, such as laser light tweezers and so on, but laser is not all diseases can be cured!

In the case of no loss, not only the laser, any light can travel infinitely, of course, the laser has good collimation and high energy, which makes it more advantageous than ordinary light sources in the case of long distance and considering the propagation of loss! Some high-energy lasers can travel thousands of kilometers without any problem, but if they propagate in low-loss optical fibers, the distance will be even farther!

Can lasers kill? Joke, the Americans shot down their own satellites with laser cannons, do you say they can kill people? The high-energy laser commonly used in our laboratory irradiates the body for 1,2 seconds and feels hot, and the ultra-high-energy laser also wears a radiation suit, which basically hits your eyes, and you will collapse in your life!

1.The famous German physician Johann Schellen is not only highly skilled in medicine, but also known for his heuristic teaching methods.

Ode. In an internship class, he told college students: "As a doctor, you should have two qualities: first, you are not harsh.

Seek cleanliness; Second, be observant. When diagnosing diabetes, some veteran doctors often taste the patient's urine with their own mouths.

taste. After that, Sherlane demonstrated to his classmates that he dipped a finger into a small cup of urine and reached for it.

Licked in the mouth. After doing this, Sherlane asked the students, "Who's going to try it?" ”

A diligent student tasted urine anyway.

Sherline shook his head and said to him, "Classmate, it's true that you are not a cleanliness fetish, which is good, but you have no sense of observation. You don't.

I didn't notice that just now I dipped my middle finger in a small cup, and it was my ring finger that I licked. ”

2.The German physicist Kirchhoff (1824-1887) once gave a lecture and pointed out that it can be seen from the solar spectrum.

The black line proves that there is gold on the sun.

A banker who came to the lecture ridiculed Kirchhoff: "If you can't get it from the sun, then it's gold."

What's the use! ”

Kirchhoff was later awarded a gold medal for his discovery in spectroscopic analysis, which he showed to the banker, and.

He said, "Behold, I have finally received gold from the sun." ”

3.Wilhelm Konrad Röntgen (1845-1923), a famous German physicist, discovered a special shot in 1895.

The line, named Roentgen rays, is what we often call "x" rays, and caused a sensation throughout Germany.

Soon after, Roentgen received a letter to him ordering X-rays by mail, and Roentgen humorously replied: "At the moment, I have it on hand.

There was no stock of X-rays, and mailing X-rays was a rather cumbersome affair, so orders could not be followed. So let's do it, please.

Chest send me it! ”

The teacher is very angry with Xiao Ming, because this student has committed things before, and this child has asked parents to help with homework many times. The teacher hated this student very much. No, something happened again.

The teacher looked at Xiao Ming's homework and said, "Do you know what mistakes you made, and you have problems with your homework again." Xiao Ming was stunned and said:

What's wrong. The teacher patted Xiao Ming's homework book and said, "Do you think I'm blind, you deliberately missed questions in your homework, what does this mean?"

Are you kidding me? Xiao Ming said: "Teacher, why don't you see what I missed, the first question Xiaohong and Xiaoqiang met, begging the two to meet time, isn't this a problem of young love between men and women, how can I do it?"

In the second question, Xiao Qiang went to chase Xiao Wang, Xiao Wang walked ten minutes in advance and asked Xiao Hui Yanqiang when he could chase.

After the four Tang monks and apprentices returned from learning the scriptures. Seeing that technology is now developed, money is needed everywhere, but the four of them are poor. I want to buy a house and have no money, I want to buy a car, I have no money, I want to have a good meal, but I still don't have money.

The four of them discussed starting a business together, and they must make a lot of money and become social figures again. Wukong said: "I go to talk about Zen performances and do street performances, and with my attraction, I will definitely attract a lot of people."

Tang Seng thought for a moment: "This can make money, but it's too slow, it's not suitable, think about it again." Bajie said:

Recently, the ** of pork is quite high, I am an industry insider, let's go to get a pig farm, we will definitely make a lot of money. Tang Seng vetoed: "We don't have the capital, the cost of raising pigs is too high, think about it again."

Sha Seng said: "Then go to my quicksand river in Hanling, let's pour some sand, we will definitely make money, and there is no cost." Tang Seng thought.