irom's Blog

Archive for the ‘Philosophy’ Category

Found that nice video demonstrating double slit experiment (experiment first shown by Thomas Young in 1803?). It clearly shows that matter  can display characteristics of  both waves and particles. Matter particles, such as electrons, produce interference patterns due to their wave-like nature. In order for a particle to interfere with itself (remember one electron is shot at the time), it must pass through both slits.. Double slit experiment is the key to understand quantum physics and nature of world (not only microscopic). It is breakdown of objective reality, raises questions: Does one matter particle passes thru both slits at the same time? Is it wave or particle ? Can we observe it being particle and wave at the same time ?

The double slit experiment is a good test of the role of the observer in the quantum realm. The behavior one finds depends upon what one chooses to look for. If we modify the experiment by putting a detector near each of the two slits it will bring two consequences.  Sometimes the electron would be detected near first slit and sometimes near second slit (we can’t predict which slit the single electron will choose). The other consequence of this would be destruction of the interference pattern on the screen. The electrons would split evenly. For the first time in physics, indicates that there is a much deeper relationship between the observer and the phenomenon.

Nothing

Posted on: January 16, 2012

Is there such thing as nothing ? I was taught at school that there is nothing in quantum physics (as well as it proves that nothing comes out of nothing). But is nothing in quantum physics same thing we understand as nothing by our intuition ? In quantum physics nothing is just sate of system, so to get nothing at least system has to exist. The good analogy can be found in Stephen Barr book which refers to bank account where someone can get 10usd, or 0usd (state of system is changing). But zero balance on bank account is not the same as not having bank account, right ?

In  quantum nothing (vacuum) where there is nothing but supposedly empty space there are constant quantum fluctuations with particles continually popping (so called pair or matter creation) into and out of existence.

There are proofs based on subtle and powerful Godel’s theorem that  human mind is not computer program. This is because formal and consistent systems according to Godel lead to statements which are neither provable nor disprovable by systems itself, but which are nevertheless true statements. So if human mind was acting as computer program it would contradict itself creating statements which are provable.. and not provable to be true. See below picture from Alan McKenzie page.

Is that why we stopped to work on human-computer ? This proof is 80 years old.

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What is Stellar Paralax ? In astronomy it was used as a scientific argument against heliocentric for many centuries. So it’s not true that heliocentric was not accepted by Church officials because it contradicted Bible (it doesn’t as Theory of Evolution does not) but because there was no proof. Heliocentrism was lacking of observable stellar parallax. See illustration here

Copernican mathematics was not confirmed by physical observation. In middle ages mathematics was not considered as enough evidence for anything.

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I’ve read in William Lane Craig that philosophically, the idea of an infinite past is very problematic. If the universe never had a beginning, that means that the number of past events in the history of the universe is infinite. But the real existence of an actually infinite number of things leads to metaphysical absurdities. To give just one example, suppose you had an infinite number of coins, numbered 1, 2, 3, . . . , and so on, to infinity, and I took away all the odd numbered coins. How many coins would you have left? Well, you’d still have all the even numbered coins, or an infinity of coins. So infinity minus infinity is infinity. But now suppose instead that I took away all the coins numbered greater than three. Now how many coins would you have left? Well, three! So infinity minus infinity is three!


In each case, I took away an identical number of coins from an identical number of coins and came up with self-contradictory results. In fact, you can subtract infinity from infinity and get any answer from zero to infinity!

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