Ming Dynasty: Teaching The Prince Dragon-Slaying Skills At The Beginning

After the female teacher said get out of class was over, all the students chose to turn on their personal optical brains and search for "The Observation Theory of Time in the Past World" written by the former scientific saint Ban Heng, and Yan Feihong was no exception.

After all, even if you want to seek help from the teacher, there is no need to rush, at least you are still safe now.

Moreover, Yan Feihong is also very interested in the time-related time machine that the teacher just mentioned.

The second time he opened his personal optical brain, Yan Feihong also discovered another special point that he had not noticed just now.

That is, after thousands of years of evolution, the Chinese characters in this world have obviously developed differently from the Chinese characters in my memory of the "previous life".

But based on the Chinese characters for "past life" in my memory, I was able to read most of the picture even by guessing.

Just like the "previous life" in his memory, even if a person has never learned traditional Chinese characters before, as long as he learns simplified Chinese characters, he can almost read traditional Chinese characters without any dyslexia.

Even if it is Oracle bone inscriptions from one or two thousand years ago, or various Chinese characters such as official script and regular script, even Meng Daichai can understand some of them more or less.

I have to say that the continuity inherent in Chinese characters from ancient times to the present is truly terrifying.

And even if there were other words that he couldn't understand, when he focused his attention, the meaning of these words would naturally emerge in his mind.

Yan Feihong didn't know whether it was the original memory of the Chinese characters of this era that came with his body, or whether it was some kind of "black technology" of the era relative to him.

For example, as long as you focus on something on the optical brain, the optical brain will transmit the meaning of such things to the mind of the viewer through brain waves.

After all, similar "black technology" was also described in the science fiction works in his "previous life" memory.

As the saying goes, once reborn, twice familiar, after having the experience of opening his personal optical brain to search for creations before, this time Yan Feihong also quickly searched for "The Observation Theory of Time in the Past World" written by the former scientific saint Ban Heng. .

Not long after, Yan Feihong finished reading "The Observation of Time in the Past World", his eyes filled with shock.

The content of "The Observation of Time in the Past World" is not complicated. It mainly talks about how the scientist Ben Heng measured the speed of light, the experiment of measuring the distance between the earth and the sun, and his conjecture about the time of the past world.

Saint Banheng believed that the speed of light 510 was not infinite and unmeasurable. He believed that light just traveled very fast.

In order to prove this point of view, Kesheng Banheng began his experiment to measure the speed of light.

At first, Kesheng Banheng adopted the "Gear Shading Method" to measure the propagation speed of light.

Simply put, it uses a light source, a rotating sunshade with 720 gears, a reflector fixed 8 kilometers away, and a lens to form a set of measurement facilities.

Then the light from the light source is emitted through the lens to an 8-kilometer reflector, and then the number of times the light is reflected in a certain period of time is calculated based on the reflected light, the number of times it passes through the gear gap and the speed of the gear.

Finally, the speed of light propagation is found.

However, since the teeth of the gear have a certain width, and the reflected light may hit the middle of the teeth, or it may hit the edges, both are covered, and the calculation is the same.

Therefore, although Kesheng Banheng calculated the propagation speed of light at 315,000 kilometers per second this time, Kesheng Banheng believed that this data was not accurate and was only close to the true propagation speed of light.

Therefore, Kesheng Banheng adopted another method of measuring the speed of light, which was to replace the rotating gear shield with a rotating plane mirror.

The reflected light falls on the plane mirror. As long as you know the rotation speed of the plane mirror and the number of times the light falls on the plane mirror, you can calculate the transmission value of the speed of light.

This time, the speed of light calculated by Kesheng Banheng was 298,000 kilometers per second.

But Kesheng Banheng still believes that this is just a speed of light value that is closer to the real speed of light, not the real speed of light value.

So based on this measurement method, we further improved the distance between the mirrors to 36 kilometers, and finally measured the propagation speed of light to be 299,796 kilometers/second.

Kesheng Ban Heng was quite satisfied with the speed of light calculated this time.

However, Saint Banheng believes that this may not be the true specific and accurate propagation speed of light.

Because this is a light speed value calculated through the back and forth reflection of light, the intermediate reflection time, air refraction, etc. may also cause certain slight errors.

But even with such an error effect, it should not be too far (bhcg) from the true speed of light value.

This was also confirmed by later generations of scientists after Kesheng Benhengshi, who used more scientific methods to measure the propagation speed of light in the laboratory.

Later scientists accurately measured the propagation speed of light in the laboratory to be 299,792.458 kilometers/second.

This is only a difference of about 4 kilometers/second from the speed of light calculated by Kesheng Banheng's outdoor reflection!

But this was three or four hundred years later.

From another perspective, the Ke Sheng Ban Heng clan is simply terrifying.

It can be said that the speed of light calculated by Kesheng Banheng is almost at the limit of the accurate speed of light that can be obtained using Yuanshi's outdoor intuitive experimental method. It is almost difficult to further improve it.

After measuring the speed of light, Saint Banheng went further to measure the distance between the sun and the earth.

In order to measure the distance between the sun and the earth, Saint Benedict proposed the "Transit of Venus Method".

The idea of ​​Saint Ben Heng is that the sun, the earth and another celestial body can be used to form two triangles.

Then using a known side and an angle, you can calculate the length of the other side.

The other celestial body is Venus inside the earth.

Of course, there is not only Venus but also Mercury on the inner side of the earth, but Venus is closer to us and farther from the sun, making it easier to observe, so Venus has become the "best choice".

Because Venus is on the inside of the Earth, it sometimes blocks between the Earth and the Sun. This is called a "transit of Venus."

Saint Ben Heng believes that if we observe the transit of Venus at two very distant points on the earth, we will find that its projected position on the sun is different.

Therefore, the observer's line of sight will take Venus as the vertex, forming a subtending angle on the side facing the sun and the earth.

And we can measure this angle.

At the same time, for Kesheng Banhengshi, who had already measured the diameter of the earth before, measuring the distance between two observation points was not a problem.

In other words, if you know the vertex angles and base sides of an isosceles triangle, you will know all other information. This is also simple high school mathematics knowledge.

However, there is a problem here: because the orbits of the planets are not all on the ecliptic plane, but have some declinations.

Therefore, although Venus will "overtake" the Earth's orbit once or twice a year, it may pass under the sun, causing us to not see the transit.

Therefore, there is a situation where the transit of Venus occurs after an interval of eight years, and the next one will have to wait more than a hundred years.

Therefore, for some scientists, once they miss the opportunity to observe the transit of Venus, they may not be able to wait for the second opportunity to observe the transit of Venus for the rest of their lives.

Fortunately, Kesheng Banheng lived long enough and had good luck, so he successfully observed the transit of Venus.

And further calculated the distance between the sun and the earth, which is approximately: 152 million kilometers to 154 million kilometers.

After the scientific saint Ban Heng, it took another three to four hundred years before later generations of scientists used more advanced scientific and technological means to more accurately calculate the distance between the sun and the earth to be 149.6 million kilometers.

The distance between the sun and the earth calculated by the scientific saint Ban Heng at that time can be said to be very close to the distance between the sun and the earth calculated by later generations.

It can even be said that the error calculated by Kesheng Banhengshi at that time was entirely due to the limitations of the objective environmental conditions at the time, rather than the lack of ability of Kesheng Banhengshi.

After measuring the speed of light and the distance between the sun and the earth.

The scientific saint Ban Heng also calculated the approximate time it takes for sunlight to emit from the sun and then hit the earth.

And this is not difficult at all. After all, if you know the distance and the speed, then if you want to know the time, just divide the two.

Therefore, the scientific saint Ben Heng calculated that it takes about eight minutes for sunlight to reach the earth from the sun.

This is also very close to the 8.3 minutes calculated by later generations of scientists three or four hundred years later.

If we get here, it is not just the scientific achievements of the Ke Sheng Ban Heng that are hundreds of years ahead of the times.

Then the "Past World Time Observation Conjecture" proposed by the scientific saint Ban Heng later is very thought-provoking.

By calculating the speed of light and the distance between the sun and the earth, we know that it takes about eight minutes for sunlight to reach the earth from the sun.

In other words, the sunlight that people see is the sunlight from eight minutes ago.

To give a simple example, for example, if the sun emits its first beam of sunlight at six o'clock in the morning, then the time it takes for people on earth to see this first beam of sunlight with the naked eye is about six o'clock and eight minutes.

At the time point of 6:08 minutes, the sunlight emitted by the sun at this moment is the Nth east sunlight.

The Nth beam of sunlight and the first beam of sunlight are not the same beam of sunlight at the same point in time.

In other words, the sunlight we see, or the sun we see, is always the sun eight minutes ago.

If the sun suddenly disappears at six o'clock, then the last beam of sunlight emitted by the sun at six o'clock will have to travel for eight minutes before reaching the earth and being seen by people at six o'clock.

In other words, from 6:00 to 6:08 when the sun actually disappears, compared to people on the earth, the sun still "exists" and continues to "shine".

Only after the eighth minute, when the last beam of sunlight from eight minutes ago disappears, will people on the earth see the real result of the sun disappearing.

The same is true if we conduct solar light observations at a distance of 300 million kilometers from the sun.

Then we will not see the result of the sun truly disappearing until after 6:16.

So, what if we extend this distance further?

It is known that there are twenty-four hours in a day, which means a total of one thousand four hundred and forty minutes.

It is known that it takes about eight minutes for sunlight to reach the earth from the sun, and the distance between them is about 150 million kilometers.

One thousand four hundred and forty minutes divided by eight minutes equals one hundred and eighty minutes.

One hundred and eighty minutes multiplied by 150 million kilometers equals 27 billion kilometers.

Then suppose that at the same point in time, for example, at six o'clock in the morning on January 2, then at a distance of two hundred meters from the sun

If you observe the sun from a place seven billion kilometers away.

So the sun observed at a distance of 27 billion kilometers, or the sunlight received, is the sunlight at 6 a.m. on January 1st.

In other words, what you see is the sun as it was one day ago.

By analogy, 27 billion kilometers times 365 days equals 9855 billion kilometers.

So at the same point in time, if you observe the sun from a place 9855 billion kilometers away, what you observe is the sun one year ago.

If the distance is further extended, 985.5 billion kilometers multiplied by two thousand years equals 197 million kilometers.

So at the same point in time, if you observe the sun 197.1 billion kilometers away, what you observe is the sun two thousand years ago.

If the observation ability is more outstanding, it is assumed that not only can we observe the sunlight emitted by the sun, but we can also further see the specific features of the sun through some kind of technological things.

changes in body flare.

So if at the same point in time, say 2100 years ago, and then observe the sun at a distance of 197.1 billion kilometers, then what will happen here?

This is a place where you can see the specific flare changes of the sun two thousand years ago.

If we can go one step further, we can transmit the observation results of the sun from a place 197.1 billion kilometers away at this point in time of 2100 years back to the same place in real time.

The words of human beings on earth at this point in time of 2100 years.

Then humans on earth at this point in time of 2100 years can look back on history and "see the specific changes in the sun's flares two thousand years ago.

For the same reason, if the object of observation is changed from the sun to the earth.

Then, observations are made 197.1 billion kilometers away from the earth, and the observation results 197.1 billion kilometers away can be transmitted back in real time.

A word to humanity on Earth.

Then humans on the earth can clearly see the scene of the earth two thousand years ago, and even see the people who existed on the earth two thousand years ago, and what happened

of various things.

And this is the observational theory of time in the past world proposed by the former scientific saint Ban Hengshi!