Re: The beginning: where is it ?
Posted: Wed Feb 09, 2011 4:21 pm
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Can we use a model of a ball in physical condition: T= 0K?duszek wrote:Quantum probably comes from Latin and means: how much.
If you use a model of a big ball then there is a frontier
between the ball and outside of the ball.
And if there is no outside of the universe then the model of a ball is not good.
Answering for Thundril, yes, that's pretty much it. The electron is at one energy level, and then it "jumps" to another energy level, never actually moving in between the two levels. If you're familiar with computer graphics, a "quantum" is sort of like a "pixel". On your monitor, a dot is either in one pixel or the one next to it, there is no way for something to be in between the two pixels, and a dot doesn't actually move from one pixel to the next, it "jumps" directly from one to the one next to it. A pixel is the quantum of the picture on the screen.artisticsolution wrote:Hi Thundril,Thundril wrote:The 'quantum' isn't a particle, it's more like a measure or amount, in the same way that 'ounce' and 'gram' are amounts of weight; 'mile' and 'inch' are amounts of distance; 'litre' and 'gallon' are amounts of volume. The word 'quantum' is used to refer to the smallest possible 'amount' of energy. So a particle, (for example an electron) can only have certain discrete levels of energy, and cannot, even theoretically, exist in a state part-way between these levels. Imagine the particle at some moment has a certain level of energy, and the next moment it has a lower (or higher) level of energy, without at any time being in a state that is partway between those two levels. Difficult to picture, isn't it? And it hardly makes sense to us. But this is what existence is really 'like' on the sub-atomic scale. The smallest possible 'amount' of energy that the particle can gain or lose is what the word 'quantum' refers to.socratus wrote:Let us say that quantum of light is an abstract particle
Welcome to the forum. I just wanted to clarify what you mean here. Do you mean to say that an electron can exhibit different states of energy but that the change between the 2 states is nonexistent? And it is this measure of energy that is the definition of the word "quantum?
(sorry in advance for my ignorance. I just want to follow along in order to learn.)