The first lesson of the "Tiangong Classroom" was officially opened today (December 9), and the astronauts of Shenzhou 13, Zhai Zhigang, Wang Yaping, and Ye Guangfu, gave space lectures on the China Space Station. How does a weightless environment form a water balloon? Why are there two images, one positive and one negative? Wang Yaping takes you to do an interesting experiment ↓
Shenzhou 13 crew astronaut Wang Yaping: Now we inject water into the water film to make it a big water balloon, and the students all know that this is because the surface tension of the water in the weightless environment will show great power, so we can make a water ball that cannot be made on the ground.
Wang Yaping, astronaut of the Shenzhou 13 crew: Let's add a little more water to make the water balloon bigger, rounder and more beautiful.
Shenzhou 13 crew astronaut Wang Yaping: Students, can you see a magnified me now, which I did during the last space lecture, and everyone knows that this is the result of convex lens imaging.
Wang Yaping, astronaut of the Shenzhou 13 crew: We first asked Teacher Ye to extract the bubbles in the water balloon, and then we injected another large bubble into the water balloon. Students, do you see two images of one positive and one reverse now, which is very difficult to see on the ground.
Wang Yaping, astronaut of the Shenzhou 13 crew: Students can also think about it, why are there two images of one positive and one negative? Interested students can delve into it, here I can give you a little hint, this is because the bubble splits the water balloon into two parts, the result of imaging separately.