What is half-life?

Half-Life is a game developed by a fat guy with a binary brain.

The half-life is the time it takes for half of the nucleus of a radioactive element to decay. Judging historical age based on the half-life of the radioactive isotope carbon-14 is a commonly used research method in archaeology - as long as the decay content of the radioactive element is measured, the target object can be known

how old.

It sounds quite high-end, and seems to have nothing to do with the daily lives of ordinary people. It has nothing to do with ordinary high school students like Bai Yang. We ordinary people live peacefully, what does it have to do with radioactive isotopes? What does it have to do with half-life?

What connection can be made?

Yes, please raise your left hand.

Roll up your sleeves.

Look at your watch dial in the dark - if you are an old...gentleman and own an old luminous watch, then its dial is coated with a common radioactive isotope.

tritium.

Bai Yang couldn't sleep anymore, so he immediately got up from the bed, took out his mobile phone and opened Taobao.

With the help of the almighty Taobao, there is nothing you can’t buy.

Tritium tube!

The tritium tube is a common luminous tube. It is made of fully enclosed glass. The small one is a few millimeters long, and the large one is one or two centimeters. The inner wall of the glass tube is coated with phosphorus phosphor, and the tube is filled with tritium, a radioactive isotope of hydrogen. Thin tritium

The gas is weakly radioactive and excites phosphors to emit light. This stuff is often used in luminous watches, military compasses and gun sights, and is sometimes used as a buoy indicator light by fishermen who never fly to the Air Force.

The half-life of tritium is twelve years, which means that a lump of tritium element will be half dead after twelve years. The brightness of a tritium tube will drop by half after twelve years, and it will be extinguished after twenty years.

The time is just right!

It just so happens that a tritium tube is used as a time calibration object.

Bai Yang planned to buy two brand new tritium tubes on Taobao, and then go to Xianyu to find a five-year-old tritium tube and a ten-year-old tritium tube, two new and two old - but because they didn't arrive,

Half-life, so the four tritium tubes are still emitting light, and the naked eye can't actually see much difference.

This is what he planned:

Use UV glue to stick the four tritium tubes in a transparent plastic box and arrange them in the order of new, five years, ten years, and new. When BG4MSR digs out the time capsule, Bai Yang will let her find the time in the capsule.

Marker, and asked her to answer the question about the glow status of the tritium tubes - if all four tritium tubes are glowing normally and there is no difference from when she buried them, then the other party is talking nonsense.

The apocalypse and 2040 are all nonsense.

If the four tritium tubes barely glow in the dark night, it proves that the girl is telling the truth, and at least twenty years have indeed passed.

If the tritium tube five or ten years old goes out, but the new tritium tube is still glowing, it proves that BG4MSR is indeed living in the future, but she has miscalculated her age.

Bai Yang believes that there is no ironclad evidence that is stronger and more tenable than this. This is the so-called use of strength to defeat cleverness, grasp the essence, go straight to the road, and not play so many twists and turns, even if the opponent is James Bond.

Germany, 007, is a flying thief. There are ten thousand ways to see what is hidden in a time capsule secretly dug out of the ground. Even if you bury it back without anyone noticing, it will not change the luminous result of the tritium tube.

And as long as you don't reveal in advance that it is a time marker and that it is a tritium tube, the other party will not be able to know what it is, let alone give a correct answer.

Verification by forces beyond human reach will eliminate all falsehoods and lies.

This is Bai Yang's method.

I buried the tritium tube here, come on!

I'm not afraid of you using any means, no matter what you do, as long as you open the cover and read it, I will definitely know whether what you said is true or false.

Place an order!

One stick costs thirty yuan, and two sticks cost sixty yuan.

My body hurts for a while again.

But Bai Yang was eager to give it a try. As a high school student who had studied step by step since childhood, he rarely had the opportunity to do such a bold, absurd, and deviant thing. However, Bai Yang became more and more excited. His boring life was finally over.

Breaking into a different color, in novels and movies, this is often the opening of a grand adventure. This guy didn't fall asleep until three o'clock in the morning, thinking about his own plan, but the next day

Overslept this morning.

·

·

·

Banxia put down her headphones and microphone and slowly lay down on the desk.

What did he mean?

Can you provide me with evidence? Help me prove that this year is 2040?

But doesn’t he claim to live in 2019?

How can a person who lived twenty years ago help me?

The girl's cheek was pressed against the cold wooden tabletop, her right elbow was propped on the table, and the amulet hung on her index finger, swinging gently like a pendulum - it was a coin that the teacher left for her, with a hole punched in the coin and a strip through it.

The red rope can usually be hung around the neck. Banxia's eyes followed the coin and swayed back and forth, puzzled.

The fat little plastic desk lamp was placed next to Banxia's head. It was the only light source in the room. The girl's face was illuminated by the light, while her body sat in the dark. She liked to sit in the dark and think quietly.

The dark night can calm her brain enough.

How could he provide me with evidence spanning twenty years?

Bury it? Hide it? And wait for twenty years?

Banxia easily thought of this. The other person lived twenty years ago - let's assume that he really lived twenty years ago (actually Banxia didn't believe it, but she had no choice), then he was in that era

Dig a hole, bury the things he wants to deliver in the soil, and then notify yourself through the radio to dig them out.

If you can find it yourself, it will prove that all this is true.

He will know that she lives in the year 2040.

She was also able to determine that he lived in 2019.

It sounds wonderful.

Banxia stared at the red rope and the coin hanging on her finger. The coin gradually lost kinetic energy during the friction, and the amplitude of the swing became smaller and smaller. Finally, it stopped, slowly rotating around the lanyard as the axis, and the rope

Twisted into a double helix.

This sounds very reasonable, but the teacher once said that it sounds different from what it looks like, and it looks different from what it does. To judge whether something is feasible, it is not enough to rely on your ears. You must use your ears.

, eyes, hands and brain are all mobilized.

The girl's brows slowly wrinkled, and she was slightly worried.

If the other party really wants to do this - really wants to purposefully send something to him over a period of twenty years, then this may not be a simple matter.

Once you have a goal, obstacles will naturally follow. This world will always let you reach the end point you don't want to go to inadvertently, and at the same time set up many obstacles in front of the goal you want to go to.
Chapter completed!