"Today, I will introduce you to the 500-meter spherical radio telescope, or FAST for short, which is our Chinese Sky Eye. It is located in Guizhou, the largest and most sensitive in the world." Grandma Wu, who is currently explaining, can take a moment and lift it from the bottom of the screen. Get up with an iron pot and continue to demonstrate to the camera:

　　"FAST is like a big pot, how big is it? If this pot is filled with Moutai, every person in the world can dispense 4 bottles. The 500-meter-caliber FAST is like an eye looking upward... When an alien contacted us, the earliest discovery may be FAST in China."

　　Wu Yuren, a 72-year-old professor of physics at Tongji University, has become popular recently. After retiring, she used the short video platform to popularize physics knowledge and demonstrate interesting physics experiments.

In fact, she has been insisting on the cause of science popularization for 16 years. “The construction and development of the country cannot be separated from the improvement of the quality of the whole people, and more in-depth learning and useful science popularization are needed” is her original intention of science popularization. "Future" is Professor Wu's feelings and ideals.

Nowadays, Professor Wu’s short science videos have "brain-open" props, witty demonstrations, and vivid explanations, which have attracted the attention of millions of fans all over the Internet.

Professor Wu's short video of popular science in Kuaishou

The treasure box of "Grandma Wu"

　　Wu Yuren likes to hear everyone call her Grandma Wu.

Just like Grandma Liu entered the Grand View Garden, she felt that she was Grandma Wu entering the Grand View Garden, roaming in the unknown world, feeling fresh and curious everywhere.

　　In the video, the most common attire for grandma is the khaki multifunctional vest with a dozen pockets inside and out.

Just like Doraemon's pocket, all kinds of magical "toys" are turned out as soon as you take it out.

　　Stirling heat engine small models, Newton pendulums, pointer electroscopes, Fresnel lenses... In addition to these small devices and small models specially used for physical experiments, the "toys" in Grandma Wu's "treasure box" are simply varied——

　　There are luminous whistle flywheels that we loved to play in childhood, puppets, piggy banks, "water birds", and more of the most common things in life, such as mineral water bottles, plastic tubes, silk scarves, glasses, Colander, pot cover, toothpicks, bamboo broom, trash basket, etc.

　　What do cosmic rays look like in space?

Grandma held up a bamboo broom with her right hand and scratched her left hand from the broomstick to the end. Netizens suddenly understood: its trajectory is like a broom, from concentration of energy to gradually weakening and dispersing.

　　How did the Rockets go to the sky?

Rely on the reverse thrust of high-pressure gas.

Can you imagine the picture?

Grandma Wu took out a balloon and blew it up a little bit. When she let go, the balloon jumped up and flew away.

Isn't it clear enough at a glance?

Grandma took out another mineral water bottle, poured liquid nitrogen into it, tightened the cap with a hole, and turned it upside down; the bottle dragged a long white steam tail, like a sky monkey, disappearing.

Professor Wu doing simulation experiment of Shenzhou 13 launch

　　Some netizens asked grandma what happened to the Faraday cage?

Without a Faraday cage, Grandma Wu brought a colander from home, made a conductive device, and attached small paper strips to the inside and outside of the colander. The electrostatic shielding effect is clear at a glance.

　　In Kuaishou’s comments, netizens left a message saying: "This is what physics class should be like!"

　　Grandma replied: It's not too late, not too late.

Professor Wu doing experimental demonstration

Sixteen years of popular science career, short video opens a new situation

　　Counting from the physics practice workstation of Tongji University, Grandma Wu has been doing physics science popularization for teenagers for the 16th year.

The children's enthusiasm for participating in experiments and hands-on exploration is the source of motivation that inspires Grandma Wu to stick to this business to the end.

　　However, it is not an easy task to do well in physics science.

Grandma Wu and the team are always thinking about how to "translate" complex physics principles and difficult physical terms in easy-to-understand language, and at the same time accurately convey them to the public without distortion?

This requires not only a deep reserve of physics knowledge, but also a strong ability of language expression and experimental demonstration.

　　Popularizing science for children is even more difficult, because the language acquisition and acceptance abilities of children of different ages need to be considered.

　　Grandma Wu and young people dedicated to science popularization and innovative education for children and youth formed a team.

It is also the young people in the team that began to try to use the emerging fast-hand short video format to spread popular science content.

In the short video, those magical experimental images can be presented more vividly and three-dimensionally. Special effects, pictures, text descriptions and other materials can also be added to the video to make the experiment look interesting.

　　Gradually, the team discovered that as long as it was the video commented by Grandma Wu, the clicks were particularly high, and there were several "popular styles" in succession.

She seems to have natural expressiveness, expressing vividly and naturally, and full of enthusiasm.

She can always conjure all kinds of "magic weapons" and use the tools that can be seen everywhere in her life to explain the complex phenomena and laws clearly.

Grandma Wu's video content about physics was updated regularly.

　　Different from face-to-face lectures with students in class, in short video presentations, Grandma Wu needs to convey the content as quickly and efficiently as possible in a very limited time, vividly and interestingly.

Although the duration of a short video is short, it takes three to four hours to shoot. It often takes two or three times in a row, and then the team helps to edit it.

　　The most difficult is the early creative planning script, and this part of the work often relies on the inspiration and wisdom of Grandma Wu.

Fortunately, Grandma Wu had a lot of ideas and a big brain hole; and she was not afraid of hardship and tiredness, and she often played with young people.

　　As long as more people can realize the charm of physics and appreciate the endless fun of the scientific world, Grandma Wu feels that all the efforts are worthwhile.