The Knowledge of Starting a Fire Is Great
"No?" Hu Cheng was puzzled, but he still obediently put his glasses back on.
"Mythic glasses are all concave lenses. They have a dispersing effect on light and can't make a fire. The only thing that could gather light and start a fire was presbyopic glasses. Because reading glasses were concave lenses, they had the effect of gathering light.”As Tang Ming explained, he took some easy to light dry grass and placed it on the bottom layer. He placed some wood chips on the top and then pointed Father Hu's presbyopic glasses at the wood chips. Everyone could clearly see the sunlight gathering on the lenses to form a bright spot, and this bright spot was facing the wood chips below.
Hu Cheng was puzzled." But I've seen those wilderness survival programs that use glasses to start a fire. Could it be that they're all lying?"”
Hu Cheng was still a little unhappy when he thought about how he had been deceived.
Tang Ming shook his head." Not really. They might have dripped water on the lenses, or they might have stacked the two glasses together, so that the concave lens becomes a concave lens."”
Hearing this, Hu Cheng shouted in surprise,""Master Tang, you're right. They did drip water on the lenses, but they didn't explain, so I thought it was to wash the glasses! He didn't expect it to turn a concave lens into a concave lens.”
But even so, Hu Cheng was still dissatisfied with the wilderness survival program he had watched previously. How many people would be misled if he did not explain such an important matter?
The principle of a concave lens dispersing light and a concave lens focusing light was already known in junior high school physics!
He had actually forgotten about it. Fortunately, Master Tang had corrected him. Otherwise, he would definitely be embarrassed if he said it in the future. However, thinking about it, no one was as capable and meticulous as Master Tang.
He was simply like a know-it-all.
Father Hu's vision was blurry after he took off his glasses, so he didn't move. When he heard his son's words, he immediately said,"I told you to study hard. Look at all the knowledge you've learned! Look at Master Tang. He's already eighteen years old. Why are you so stupid?”
When Hu Cheng heard this, he didn't feel embarrassed at all.""Aren't I being fooled by those foreigners? Who knew that they were all liars!"
Father Hu continued to mock his son."If you study hard, will you still be cheated? Look at Master Tang, he wasn't cheated!"
"Yes, yes, yes. I'll definitely study hard under Master Tang in the future!" Hu Cheng hurriedly smiled.”
Tang Ming smiled and did not say anything. Instead, he looked up at the sun and finally adjusted the angle. Although it was simple, it was just a bedding grass. He just needed to put down his glasses. This way, he could not start a fire.
After all, the glasses were only so big, and the amount of sunlight they could gather was limited. They relied on the heat to start the fire, so they had to find the best angle to gather the sunlight. They had to maximize the amount of sunlight. Anyone who had studied physics knew that the best angle of refraction for a concave lens was 45 degrees.），At this angle, the amount of sunlight gathered by the concave lens was the largest.
Now that they were in the wild, there was naturally no tool to measure the angle. Even if there was, it was inevitable that there would be errors. However, Tang Ming, who had undergone the system modification, directly adjusted the angle of the glasses to 45 degrees. There was no error at all!
Therefore, after a while, the thin wooden piece began to emit wisps of white smoke. Then, with a puff, a cluster of flames instantly ignited!
Oh my god!
Everyone was shocked and stared at the fire that was burning brighter and brighter.
" It really lit up!!!" Lin Gengxin said in shock.
"So fast! The video took a long time. Master Tang, you haven't even been there for a minute, right? This is too godly!" Hu Cheng suddenly felt like a fool. He had drilled so many logs but still could not start a fire.
The other onlookers were completely stunned.
Tang Ming smiled and returned the glasses to Papa Hu. He explained,""The angle needed to be taken into consideration when igniting the light. If the angle is right, the ability to gather sunlight will naturally be greater, and the ignition will naturally be faster.”
"I didn't expect there to be so much knowledge in starting a fire!" Chen Chichi sighed.”
Lin Gengxin threw the two wooden sticks aside with a look of disdain and teased,"Tang Ming, you knew that you couldn't start a fire by drilling wood, so you deliberately laughed at your Brother Lin, right?”
"It's true that you're making fire by drilling wood." Tang Ming shook his head.”
He really didn't have the intention of watching them make a fool of themselves. Originally, he also wanted to drill wood to make fire. In the end, Hu Cheng said it first. Naturally, he was happy to relax and let them do their work. However, he didn't expect that they would actually light each one of them, so he did it himself.
"Really?" Chen Haifeng quickly said. But we've already rubbed our hands, and there's no reaction at all!”
Hu Cheng also nodded repeatedly. Because his glasses could not make fire, he now had doubts about the survival methods he saw in the wild.
Obviously, Sun Tao and Zhao Shan didn't believe it either. Li Yang and Zhou Lai didn't say anything.
Tang Ming didn't say anything else. He picked up the two wooden sticks that Lin Gengxin had thrown away and put some grass where the two sticks met. Then, he quickly spun the wooden stick in his hand.
Puchi, puchi!
A series of clear rubbing sounds could be heard clearly. It was clearer and smoother than the sound they made before. It was obviously much better than the sound they made when they were rubbing.
Meanwhile, Tang Ming's hands moved faster and faster as if he did not feel tired. In the end, everyone could only see the shadow of his hands.
Just as everyone wanted to persuade Tang Ming to give up.
Whoosh!
A flash of fire appeared, followed by a cloud of green smoke that slowly floated up, followed by a flame.
Everyone didn't know what to say.
So it wasn't that the method was wrong, but that they couldn't!
This fact made all the men present feel defeated.
This book is provided by FunNovel Novel Book | Fan Fiction Novel [Beautiful Free Novel Book]