I was a village chief in a primitive society

Chapter 356: Light travels faster than sound. (2 more please customize)

"Then this is more complicated. I will tell you more when you know more words in the future."Su Bai smiled.

On the other side of the earth, according to the scope and level of plant groups, taking into account evolution, physiology, cells, genetics and other kinship relationships.

They listed the tea tree system into classification levels, and the tea classification belongs to the category of botanical classification..

This level is expressed by a series of units, namely phylum, steel, order, family, genus, and species, so the tea tree belongs to the Camellia family.

This knowledge is very complicated, and Su Bai still has to think about it for a long time. Get up.

Who told him to write novels? This knowledge involves more or less one aspect.

But now when I explain these things to the girls, they don’t understand. We can only wait until they fully understand the Chinese characters before going It's better to say these

"good."Yanhua nodded and began to look forward to literacy in the future.

"Rumble......"

"pitter patter......"

A series of dull thunderAs soon as he got up, the room was suddenly illuminated by the thunderous light.

For a moment, the room was as bright as day, but it only lasted briefly, and it immediately returned to normal.

When the next thunder sounded again, the room was as bright as ever, and the faces of the girl and Su Bai were illuminated.

After the thunder resounded across the sky, it began to rain, and the sound of rain mixed with thunder resounded throughout the tribe.

"The rainy season is coming."Yu Ying put down the tea cup and was about to turn around and walk to the window.

At first, the fox-eared lady was a little worried that the rainwater would drift in, and she didn't dare to get too close.

Until she saw all the rainwater hitting the glass, forming droplets of water. But not a drop of water penetrated into the glass.

She felt at ease, put her hands on the glass, and looked outside curiously with her immature eyes.

This was her first time spending the rainy season in a cement house. This feeling was really... So amazing

"......."Su Bai didn't say anything, and followed him to the window with a teacup in hand, wanting to see with his own eyes what the rainy season of this era was like.

There is no so-called rainy season on the earth. At most, it is said that it rains frequently during this period, but it does not mean that it rains every day.

And he heard that it rains every day during the rainy season here, so he was particularly curious.

But at this moment, there was only heavy thunder and light rain outside. Although the thunder was deafening, the rain that fell was just a drizzle.

Looking around, the entire tribe was caught in a haze of mist and rain, and the forest and river in the distance did not look very interesting.

If this scene were seen by a sketching enthusiast like Earth, he would definitely be unable to help but pick up a paintbrush and record it.

"It was the first time to watch rain from such a high place."Yanhua kept on tiptoe and looked around.

She really wanted to see the difference between the place where she usually trained and the place where she went out to pick wild fruits.

From the height she was standing at now, she could see very clearly the places she had been to before. Of course , it’s night now, and most of the oil lamps have been extinguished. It

’s also raining hazy, so it’s impossible to see those places clearly, even if you have good eyesight.

"Why can't I see anything?"Yanhua murmured to herself

"It's raining now, and it's so late at night that it's weird for you to see it."Sha Lan didn't want to complain.

The cat-eared girl kept looking at the place where her mother lived, trying to see her figure.

Originally she slept in the same room with her mother, but Su Bai said Now that there are extra rooms, why do we have to squeeze into one room for two people?

Besides, you are not young anymore, and you are now considered a miko. If you need help immediately, if you are too far away, you can't. Good command

"Does it always rain like this during the rainy season?"Su Bai suddenly asked

"No, it only rains like this for a day or two during the rainy season, and then it rains heavily."Yu Ying quickly shook her head and said.

If it rained like this during the rainy season, life wouldn't have been so hard in previous years.

And the people in the hunting team can also go into the forest to continue hunting, so the light rain is nothing.

"I see."Su Bai nodded thoughtfully.

This means that the rain in the rainy season gradually becomes heavier, and does not turn into a heavy rain all at once.

Therefore, you can still enter the forest at the beginning. The things he arranged before can be carried out again

"Wu, look, it's so bright over there."Yu Ying pointed excitedly to the other side of the river.

It was a bolt of lightning falling from the sky, and the light it emitted was particularly dazzling, illuminating most of the tribe at once.

"Start by covering your ears."Su Bai immediately covered his ears as soon as he finished speaking.

Although the others didn't know why, they also followed suit when they saw Wu doing this.

"Rumble......"

Just when everyone covered their ears with their hands, a loud noise suddenly came from the place where they had just shed tears.

Yuying stared at her pink eyes in surprise, and said in shock:"How could Wu know that there would be such a loud noise?" Yanhua felt it was very magical, and she opened her mouth slightly and asked:"Wu, this Is it witchcraft?"

Sha Lan was the same. She had not yet reacted to the huge noise, and her blue eyes could only blink.

"This is not witchcraft, this is a natural force that can be explained by science."Su Bai said simply.

In fact, lightning and thunder are actually produced at the same time, but on the one hand, the speed of light is 300,000 kilometers per second, and the speed of sound is 340 meters per second, so the speed of light is much faster than the speed of sound.

On the other hand, the speed of light is much faster than the speed of sound. Lightning and thunder are far away from them, so during thunderstorms, lightning is always seen first before thunder is heard.

This is because the propagation speed of light is faster than the propagation speed of sound. I taught physics in junior high schools on the other side of the earth.

"Wu, do we have to wait until we learn more Chinese characters to know this? Yanhua asked curiously.

Niujiao Niang can be said to be very studious, which can be seen from the first time she learned Chinese characters.

She is very curious about this aspect of things. As long as she can explain it to her, what will she do? Everyone is willing to learn

"In fact, this won't be too difficult. When you learn more words, I can do an experiment to show you."Su Bai's physics score is still very good.

And it is not difficult to simulate the experiment of light propagation faster than the propagation speed of sound.

Yanhua nodded without hesitation and said seriously:"Wu, teach us now Let’s learn words."

Su Bai was stunned by the other party's enthusiasm, and said with a smile:"Okay, there's nothing to do now anyway, just take out the Wolf's tail paper and quill."

"good."The three girls responded positively.........................................

"Second update, please support and customize."