Recent content by jonk75

In the above, it should be ##(x,y)\in \mathbb{R}^2##.

Yes, that’s what I meant. The bullet traveling faster than the recoil of the gun is an example of the kind of experiment the OP was asking for - i.e. the velocity of the bullet ends up faster than the velocity of the recoil. It’s easy enough to demonstrate on earth. Even a skinny bloke pushing...

When a bullet accelerates out of a gun, the recoil of the gun is much slower than the speed of the bullet.

This is not correct. In a high entropy state, each dimension has a seemingly random value, & every value needs to be specified individually to fully describe the system. In a low entropy state, say the ground state, each dimension has the value 0, & is described that simply. e.g. If I represent...

That is the crux of it. If it takes more space to describe it in a book, that is more information. A large book contains more information than a small book. This is probably getting too deep for a discussion here though. You should read up on information theory. A good pop-sci book is James...

You misunderstand the information theoretical meaning of "information." The higher the entropy of a system, the more information it contains, because it takes more information to describe it exactly. A room full of gas is not completely described by its pressure, temperature, & volume - e.g. you...

Information is entropy, not energy. They are different. Entropy/Information is not conserved - it always increases.

You needn't worry about interpretation to recognise that experiments on the quantum Zeno effect work. Also, polarised light can be rotated by passing it through successive polarisation filters that rotate around its axis.

I think it's a big assumption to make that everything is deterministic & reversible, especially in the light of quantum mechanics, & it's probably wrong. What we know is that increasing entropy is the result of irreversible processes.

It is said that entropy in the universe always increases. If entropy is equivalent to the amount of information in the universe, then the amount of information in the universe also always increases. That would mean that all of the information in the universe at present isn't sufficient to...

I like this explanation:

Information is also used in relativity as "what is known" about a system. If a system changes, what is known about the change can only be known at a distance from the system after a period of time, because the propagation of the information about the change is limited by the speed of light.

Hi, I'm new here. Did my undergrad physics degree 20 years ago & still very interested in the area, though unlikely to find a well-paying job in it here in Sydney, Australia.