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.