The so-called flame is a state or phenomenon that releases light and heat when combustibles and combustibles react oxidatively.

The flame is divided into inner flame, flame and outer flame, and the flame temperature increases sequentially from the inside to the outside.

Flames are not all particles such as high temperatures, and flames can also be produced at low temperatures.

Within the range from the flame center or initial plane to the outer flame boundary are gaseous combustibles or vaporized combustibles, which are undergoing a violent or more violent oxidation reaction with the combustibles. During the combination of gaseous molecules, energy waves of different frequencies are released, thus emitting different colors of light in the medium.

For example, in the case of a match that has just been lit in the air, the sulfur released from the potassium chlorate of the match head is inside the flame, which dissociates into gaseous sulfur molecules at high temperatures, and violently reacts with the oxygen molecules in the air to release light. The external flame reacts violently, so the temperature is high.

To sum up, the inside of the flame is actually a gaseous molecule that is constantly being excited and swimming. They are looking for "partners" to react and emit light and energy. And the light emitted allows us to see the flames.

I know that flames take on different colors depending on what is combusted. This brings us to the elemental flame reaction!

Some metals, or their compounds, can give a special color to the flame when burned. This is because when the atoms of these metallic elements receive the energy provided by the flame, their outer electrons will be excited to the higher energy excited state. The outer electrons in the excited state are unstable and have to transition to a lower energy ground state.

The outer electrons of atoms of different elements have ground states and excited states of different energies. In this process, electromagnetic waves of different wavelengths are generated, and if the wavelength of this electromagnetic wave is in the visible wavelength range, the characteristic color of this element will be observed in the flame.

This property of the element can be used to test the presence of some metals or metal compounds. This is the flame color reaction of the substance test.

I've never seen a black flame before, though. Although astatine combustion may produce a black light, it is not noticeable. After all, black is a color that represents no light or little light, but combustion can produce heat, which will inevitably cause light. What's more, the way that the flame burns is really weird.

"Little, what do you think that flame is?" Everyone was speechless all the way, immersed in the shadow of Qin Han's death. Only Bu Xiaoxin was the first to recover and asked in a low voice.

I shook my head, "I don't know." ”

"Is it possible that the legendary black lightning bolt?" She said mysteriously.

Black lightning. This is because due to the action of sunlight, cosmic rays, electric fields of clouds, linear lightning and some physical and chemical factors, the sky will produce a kind of chemically active particles, which will gather together under the action of electromagnetic fields, and can roll bigger and bigger like a snowball, forming balls or flames of different sizes. This sphere does not emit energy, but it can persist for a long time, it has no bright light, it is opaque, so it can only be observed when there is light.

I shook my head again, "Black lightning is just a human imagination, no one has ever proven it to exist!" ”

"But no one mentioned the existence of that flame just now!" She pouted, "You see, black lightning will be flame-like, there is no sound, it will not emit energy, and it can exist in the air for a long time. All of the characteristics are the same as those of the flame just now, a silent, heatless flame. ”

"But black lightning can become very dangerous when it encounters matter, and once a substance invades, the active particles inside will mess up and cause an explosion. But the black flame just now only burned out the organic matter. I retorted.

"Have you ever seen lightning burn metal too?" She retorted.

I snorted "Metal doesn't burn, but it does!" ”

Bu Xiaoxin was dumbfounded, and only after a long time did he say, "Who knows, in short, the characteristics of black lightning are just human guesses, and there is no evidence to prove it." Maybe it doesn't reflect on the metal, and only incinerates the organics! ”

"It's useless to argue now, take the instrument to detect it another day, and you can't run away from the horizontal and vertical drowning pool." I shrugged my shoulders. The suspicion of her was even stronger. This woman is definitely not an adventurer, she is not simple. However, why do you always put heat on me, it seems that you know me very well. Besides, she seems to know a little bit about me. Could it be that this woman knows herself before she has no amnesia?

Thinking about it, time flew by, and soon we followed the plastic rope to the depths of the cave. But when they reached the end of the cave, everyone froze again.

There is a dead end ahead, the real end!

There is only a stone wall not far away, and there is no entrance to the cave. Yingshan pulled the rope tied to it, and the other section that had been nailed to the outside of the cave was pulled over. He stared blankly at the rope in his hand, and his head couldn't react for a while.

"What's going on?" Yi Jiang's voice trembled a little.

"The rope is broken." Yingshan dry road.

"No reason, didn't you say that the rope is tough and definitely won't break?" She became hysterical, and it seemed that Qin Han's death had hit her hard.

"I'll see!" I snatched the end of the rope and looked under the light. Indeed, the rope was broken, and it was cut alive. I don't know if it's the surrounding rock wall or something, but the tool for cutting the rope is clearly not too sharp. To put it bluntly, it's like some kind of animal's teeth.

Bu Xiaoxin also seemed to see this, exchanged glances with me, and whispered, "There are other creatures in the cave!" ”

"Quite possibly!" I nodded, "Did you bring a weapon?" ”

"It's funny, how can you not bring it to a place like this." Bu Xiaoxin smiled wryly: "The Czechs, the CZ83 type 9mm double-action pistol in the 70s of the 20th century. It uses 7.65 millimeter Browning bullets, 9 mm Browning short rounds, and Soviet Makarov bullets. The total length is 172 mm, the barrel length is 97 mm, the 7.65 mm nozzle weighs 0.75 kg when firing the no-gun bullet, and the no-gun weighs 0.8 kg when the 9 mm nozzle is fired. It uses a 10 double-row magazine feeding mechanism with an effective firing range of 50 meters. ”

"Amazing, although I don't understand. However, I also brought a gun, which I bought on the black market. "I patted the inner bag.

At this time, Shi Yueying pulled me hard, and her tone was a little unkind, "What are you talking about?" Seems to be a good talk? ”

"Talk about how to get out." I pointed to the cave wall in front of me, "What do you think?" ”

"We can't get out!" She sat on the ground, looking depressed.

I'm afraid everyone is just as depressed as she is. Although Yijiang and He Xue are capable and have adventure experience, they are both girls, with a look of crying at any time on their faces.

At the end of the day, I struck the wall of the cave with a pickaxe, and it seemed that it was impossible to open a hole with the existing manpower. So I sat down and thought about it for a long time, when suddenly my brain jumped up and said loudly, "No, there must be something wrong!" ”

"What comes to mind?" Shi Yueying raised her head, and everyone looked at me.

"Yingshan, the rope did bring us here, right?" I asked in a hurried tone.

"Yes, we're completely following the rope." He nodded.

"But according to my observations along the way, we started from the cave, it was a line of terrain, and the road was not too bent, and the fork in the road that could be entered was negligible, and then we saw black flames. On our way back, if the rope breaks, we should still be in that passage. That passage could have been easily exited without a rope, but now we're in a dead end! I muttered, "There are only two possibilities for this, one is that the cave has moved." The second is that something bites the rope for some purpose and leads us here! ”

Bu Xiaoxin's eyes suddenly lit up: "Yes! Well, of course the cave won't move, there must be something in the cave that lured us over, so that as long as we return to the location of the black fire the same way, then we should be able to easily find the location of the entrance and escape smoothly! ”

This remark immediately gave the rest of them a glimmer of hope.

Yingshan's mental state couldn't help but improve a lot, and instead of the lifeless appearance just now, he waved his big hand and said, "Let's eat and rest for ten minutes, and we will go back in ten minutes!" ”

I don't know what hope tastes like, but I do know that disappointment is bitter.

I remember reading a story once upon a time, and I completely forgot the name and author of the story. The story is mainly about a blind man who plays the shamisen and longs to see the world in his lifetime. But when I visited famous doctors, they all said that there was no way. A Taoist priest gave him a prescription and said that he could only read it when he had broken a thousand strings. So the blind man and his apprentice, who was also blind, traveled in all directions, and at last he broke a thousand strings, but he showed that it was an empty square. Later, he realized that the meaning behind this "thousand strings" was "hope". So, he passed on this "prescription" to his apprentices who longed for the light as much as he did.

It was these "thousand strings" that supported the blind man to play to his heart's content, and he survived in a hurry for fifty-three years.

Later, a discerning man took the slip of paper and looked at it and said, 'It's a blank sheet of paper, and not a word has been written.' When the violinist heard this, he burst into tears, and suddenly understood the meaning behind the Taoist priest's 'thousand strings'. ”

A thousand strings, containing all kinds of setbacks and tests in life, when you look back and think about what life is, but also understand that life is ups and downs, full of flavors. A person's life path is inevitably a little bumpy, no one is always lucky, and no one is always unlucky.

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