I want to think again "What is the physics?" this last week article.
You know, many many people learn, use, see, think about, develop, discover the physics all over the world. Then, my physics and your physics is the same? I don;t think so.(You may say one's physics is imaginary......) I suppose there are many many physics everyone imagine. My image is mainly made from quantum physics, Newton dynamics, and particle dynamics. You have your own physics, that is you may say your image about physics. But this image is so important. Almost all people don;t major in physics, so they don't has comprehensive knowledge about physics and the way they think about physical issue. Then what is physics for them? Knowledges they learned in high school, junior high school, TV program, book they read, and so on. If we want to use or think about physics in our way (such like information tech, media, or another), we have to think there are a lot of physics images everyone has.*
Next, I want to think about old physics like Newton dynamics, or ancient Greece physics. What is physical true? If I am 18th man, I would never believe light speed is constant and time is not absolute. For me, time is absolute that made by God. So I have to think physical true is changing, it is now changing! You may hear about CERN's news release about constancy of light speed is not true. In result this news was not true, but there are probability of this is true. If so, physician were made to extend physics.
In conclusion, my physics is mine, and your physics is yours, but we can examine own physics is true, I think it is happy for us. We don't have to think about probability there are maybe no answer for our absolute extreme question. "What is the world?"
*http://www.yomiuri.co.jp/science/news/20120224-OYT1T00324.htm Article about CERN's news release.
http://www.csmonitor.com/Science/2012/0223/CERN-researchers-find-flaw-in-faster-than-light-measurement
2012年2月24日金曜日
Time
Time
What is "Time"?
If you have thought about "Time", you can't know what it is. "Time" is simple, but complex. Let's see simple sides of "Time".
"Time" is scalar quantitiy, like mass, length, electronics charge, is usually fundamental quantity. Time is combined with other physical quantities to derive other concept such as motion, kinetick energy, and field. Time is used in many many ways. There are no one knows what is "Time", in literary. It is simple side of "Time", you can understand.
You know, "absolute time" does not exist."Relative time only exist. But we use time like if "Absolute time" only exist. Why it could be? It is not difficult. It is because we are too big! We are living macroscopic world that "Relative time" can't be seen.
Today we want to know more about "Time". It is "what is time Einstein think".
Einstein think there are no time as quantity that is independent from space. In this context, space has height, width and depth. Einstein said there are only space-time, this is not constructed by time AND space. IT IS IT.
Next, I want to show what is this. It is your world. You have own space-time(more exactly, particles consists you have own space-times)So your time and my time is not same. You may think cheat me, but please think again. Why do we have to think we are share THE time? Are there rational reason? I think there are no problem if we don't share same time, don't you? Existence of relative time is proved, so if you want to say "THAT IS LIE!!!" you have to think and make theory is more than rational and fit for real.
What is "Time"?
If you have thought about "Time", you can't know what it is. "Time" is simple, but complex. Let's see simple sides of "Time".
"Time" is scalar quantitiy, like mass, length, electronics charge, is usually fundamental quantity. Time is combined with other physical quantities to derive other concept such as motion, kinetick energy, and field. Time is used in many many ways. There are no one knows what is "Time", in literary. It is simple side of "Time", you can understand.
You know, "absolute time" does not exist."Relative time only exist. But we use time like if "Absolute time" only exist. Why it could be? It is not difficult. It is because we are too big! We are living macroscopic world that "Relative time" can't be seen.
Today we want to know more about "Time". It is "what is time Einstein think".
Einstein think there are no time as quantity that is independent from space. In this context, space has height, width and depth. Einstein said there are only space-time, this is not constructed by time AND space. IT IS IT.
Next, I want to show what is this. It is your world. You have own space-time(more exactly, particles consists you have own space-times)So your time and my time is not same. You may think cheat me, but please think again. Why do we have to think we are share THE time? Are there rational reason? I think there are no problem if we don't share same time, don't you? Existence of relative time is proved, so if you want to say "THAT IS LIE!!!" you have to think and make theory is more than rational and fit for real.
2012年2月16日木曜日
Quantum Tunneling
Today I want to explain "Quantum Tunneling".
Tunneling? Yes, tunneling. If you see this word, you may think a tunnel that is in a mountain or under sea: Eurotunnel. But it is not. This "Quantum Tunnel" doesn't exist really. There are only effect called "Quantum Tunneling".Anyway what is "Quantum Tunneling" and it happens?
You may hear this word before in something about personal computer, particular CPU. There is the problem caused by this effect. And "Quantum Tunneling" is microscopic effect.You won't see this effect macroscopic, otherwise you are very, very, very lucky. I want to explain this effect using a wall and a electron. If electron want to go over the wall, you have to have more and more energy. But now, I want to you to remember that "Quantum"'s character. "Quantum" is wave! There are a wave on world and the wall. Quantum wave is not able to be seen by us, we can see where particle is after wave can't be seen. It is nature! We can do only agree! But relation between wave and where the particle is, using probability. Wave height relates to probability of where particle is. In somewhere if wave height is higher, probability that particle exist there is higher. And wave is waving now. If here wave height is more lower than one over the wall, you could see the particle in the other side of wall! This is "Quantum Tunneling".
Tunneling? Yes, tunneling. If you see this word, you may think a tunnel that is in a mountain or under sea: Eurotunnel. But it is not. This "Quantum Tunnel" doesn't exist really. There are only effect called "Quantum Tunneling".Anyway what is "Quantum Tunneling" and it happens?
You may hear this word before in something about personal computer, particular CPU. There is the problem caused by this effect. And "Quantum Tunneling" is microscopic effect.You won't see this effect macroscopic, otherwise you are very, very, very lucky. I want to explain this effect using a wall and a electron. If electron want to go over the wall, you have to have more and more energy. But now, I want to you to remember that "Quantum"'s character. "Quantum" is wave! There are a wave on world and the wall. Quantum wave is not able to be seen by us, we can see where particle is after wave can't be seen. It is nature! We can do only agree! But relation between wave and where the particle is, using probability. Wave height relates to probability of where particle is. In somewhere if wave height is higher, probability that particle exist there is higher. And wave is waving now. If here wave height is more lower than one over the wall, you could see the particle in the other side of wall! This is "Quantum Tunneling".
2012年2月2日木曜日
Bose-Einstein-condensation
We look around his special relativity using last two weeks, and he is very famous. You know Einstein. But......, do you know Bose? His full name is "Satyendra Bose", he is Indian physician and he sent one paper to Einstein. It was not accepted once by magazine: "Philosophical Magazine", but Einstein had an insight into it. Actually, it is very worthful.Today we want to construct basis to explain this topic, it is "Quantum physics".
What is "Quantum" I think, to be honest, to answer this question is impossible for human. Because our world that we live based on macroscopic world, not quantum, microscopic world. Valley between two world is impossible to measure by human. If only there are no gap, I can't know. We have to use many equipments to see quantum world. Anyway, there are many explaining by famous scientist all over the world. But, I want to explain in my words to go into the throne(maybe labyrinth) of physics.
Let's go to the microscopic world---we usually doesn't know.
Quantum has two form, particle and wave. And everything in the world is made from quantum. We want to show what will be caused by quantum.There are two walls, one is made by film and the other has two slit. (See fig.1)
fig.1 (*from http://ja.wikipedia.org/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Double-slit.PNG#filelinks)
The Electron Gun shoot a electron, what will happen? Electron will go through two slits or repelled by it. If a electron go through slit, screen is light. Then, imagine the Electron Gun shoot more and more electrons to walls. Go through, repelled, go thorough, repelled, repelled, go through, go through...... Electrons are repelled is not important for us. Let's look at screen. Wow! There are more than two light lane! This was made by interference, this interference is caused by only one quantum! It is hard to believe such thing. But in quantum, microscopic world our common sense is useless.
What is "Quantum" I think, to be honest, to answer this question is impossible for human. Because our world that we live based on macroscopic world, not quantum, microscopic world. Valley between two world is impossible to measure by human. If only there are no gap, I can't know. We have to use many equipments to see quantum world. Anyway, there are many explaining by famous scientist all over the world. But, I want to explain in my words to go into the throne(maybe labyrinth) of physics.
Let's go to the microscopic world---we usually doesn't know.
Quantum has two form, particle and wave. And everything in the world is made from quantum. We want to show what will be caused by quantum.There are two walls, one is made by film and the other has two slit. (See fig.1)
fig.1 (*from http://ja.wikipedia.org/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Double-slit.PNG#filelinks)
The Electron Gun shoot a electron, what will happen? Electron will go through two slits or repelled by it. If a electron go through slit, screen is light. Then, imagine the Electron Gun shoot more and more electrons to walls. Go through, repelled, go thorough, repelled, repelled, go through, go through...... Electrons are repelled is not important for us. Let's look at screen. Wow! There are more than two light lane! This was made by interference, this interference is caused by only one quantum! It is hard to believe such thing. But in quantum, microscopic world our common sense is useless.
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