What about the experiment of blindfolding bats It turns out that whenever he sees bats flying lightly and freely at night, he always thinks that these elves must have a pair of particularly keen eyes.
If they are blind, they can't avoid all kinds of obstacles in the dark and catch moths quickly. However, the fact was completely unexpected. Spalla Jie is very strange: Without eyes, why can bats distinguish the objects in front and catch the flexible moths?
So he blocked the bat's nose. As a result, bats are still so agile and relaxed in the air. "Its movie-like wings can not only fly, but also see everything at night?" Spalleger guessed so. He caught several bats and painted them all over, but it still didn't affect their flight.
Finally, Spalla Jay blocked the bats' ears and put them into the night sky. This time, the bat has no previous air. They bumped into each other in the air like headless flies and soon fell to the ground.
Ah! Bats fly at night and catch food. It turns out that they rely on hearing to identify the direction and confirm the goal!
Spalla Jay's experiment has revealed the secret of bat's flight, prompting many people to think further: How can bat's ears "penetrate" the night and "listen" to silent objects?
Later, people continued to study and finally figured out the mystery. It turns out that bats emit "ultrasonic waves" that people can't hear with their throats. This sound travels in a straight line, and when it touches an object, it reflects back like light on a mirror. After bats receive this "ultrasonic wave" with their ears, they can quickly make judgments, fly freely and dexterously, and catch food. !
Extended data
"Night Experiment" is the text of lesson 12 of the sixth volume of primary school Chinese in Jiangsu Education Publishing House. This text mainly tells that Italian scientist Spalla Jie finally revealed the secret of bat flying at night through many experiments, and prompted many people to further study according to his experiments, and finally discovered ultrasound and learned to use it, making great contributions to mankind.
The full text * * * has 9 natural paragraphs and is written in three parts.
The first natural paragraph is the first part, which is about bats flying in the night sky, which aroused Spalla Jie's curiosity.
The second paragraph to the sixth paragraph is the second part. Through many night experiments, Spalla Jie finally figured out that bats rely on hearing to confirm their direction and identify their targets at night.
The seventh to ninth paragraphs are the third part. Spalla Jay's experiment aroused scientists' research on ultrasound and brought great benefits to mankind.