sr.vinay

To heat a system, energy would have to be transferred from another system. I think there should be a limit to how much energy that system can transfer to the system being heated, considering the amount of mass it contains is finite. We cannot consider an open system to heat another system because of the heterogeneity.

We have particles that are described as structureless point particles.

Aren't point particles a geometric representation of particles whose dimensions aren't important at the instant when other properties are under study?

What if you don't know exactly where your particle is, then can you still say you know how big it is?

If I didn't know, of course, I couldn't say anything about the particles. I wouldn't know because I wouldn't have the appropriate equipment. What if I did? Has physics really defined a smallest point particle?

Funnily enough you just answered the question Swansont was refering to: If something might be true or might as well just not be true then it certainly doesn't have to be true.

Which is why I asked the question. Even the smallest particle, should have dimensions. The dimensions should imply that the particle is made up of something else. This might continue until we find it negligible.

Why not?

They talk of god's plan and that it was already known to the entity before it happened.

I feel it's more of : it happens and it's included in the so-called plan. For example, a leaf falls down, it's the plan. If it had fallen later, that would've been the plan. The so called order is just a conglomeration of nice observations that would've been present even if everything had been different. I'd like to see people point out to order when anarchy and chaos break out.

This might be moved to speculation:

Like we still don't know the extent of the universe, can there be something like a smallest particle? Everything has to be made of something smaller, right?

Is it that the smallest particle defined will be the maximum one can magnify things in that period of time? Is it sort of a continuum that everything has to be made of smaller particles?

Well, ellastic collisions, and about interference:

Imagine that you hold two pen torches switched on and cross the light rays. At the point of intersection, we see a brighter region. Interference, perhaps can be explained on a similar basis in the microscopic level. Take photons to have a definite boundary, when they come across other photons and interact, their properties change.

Going by the physics I've learnt, matter-waves are particles in motion.

Considering that, aren't all waves the same? And, are waves just a simplification of phenomenon so that it's easier to understand? Can't phenomenon like interference be explained with the particle theory (considering calling photons as particles to be still valid)?

Well, from what I've read on wikipedia, black holes have something weird happening near their event horizon. Wiki says that there are pairs of particle and anti-particle generated near the event horizon, thus giving the illusion of radiation and absorption!

Maybe this is what is referred by you as the anti-matter effect.

I don't think most people perceive time as something that pushes us along. It's a relative measure of longevity of an event. That's the end of it.

1/ the process is slow. the signal would be lost in the thermal radiation given out by the acretion disk.

 

2/ it doesn't happen very fast until the black hole is very small, also lessening the signal.

 

a kilo of antimatter annihilating is only going to be equivalent to a tsar bomba(largest nuke ever detonated) which, in astronomical terms is an incredibly tiny event.

 

3/ the annihilation happens INSIDE the blackhole. the energy released wouldn't get to us anyway.

Annihilation of matter by anti-matter happens very quick. The time black holes take to 'die out' is far greater than what one would expect from that by annihilation.

I don't think the anti-matter explanation is possible. Because enormous amounts of energy needs to be expelled when matter and anti-matter cancel each other out. We don't see this phenomenon.

Exactly. People live in their own small bubbles they don't want to come out of.

They don't get the whole point of education!

God is more of a psychological feeling than a fact. Starts with the placebo effect.

When people can call everything god, why not accept that those things are just things.

Why call them god?

I don't like some aspects of the society. For example, the way education is handled. Education is basically learning something we want to, out of choice. After a certain degree of compulsory education, which I understand is sort of necessary, shouldn't one be allowed to freely choose what he wants to study?

And, is it a waste of time to fret and try to do something against some aspects of the society we live in?

For example, trying to change the general outlook on something as basic as scientific temperament?

Atheism is not necessarily going against all the norms of the society. It's merely a state of mind developed by rational questioning of everything.

I always say that charges are "long-handed". One can consider them as overlapping. Point-likeness of a charge means a simple dependence of the force from distance. But the force is a long-range one. Charges are quite different from neutral atoms that need close contact to interact. Charges are long-handed and sticky.

You've explained that in context with charges. Is it the same with a magnetic field? I read something on wikipedia that the extent of charges' attraction, as an expample, is infinite because virtual photons exist throughout.

I've a question:

Consider that we somehow do travel through wormholes. If we're bending the time co-ordinate, shouldn't our body be put under series of changes in the bent co-ordinate?

As in, we're going to be put under the changes we might have undergone in getting to the place in the universe without the wormhole.

Okay, consider a wave explanation for the anti-particle. It's said that crests and troughs cancel each other out.

Is it possible for troughs or crests to perfectly cancel each other out? If not, when they do so imperfectly, what happens to the remaining part?

If it's more anti-particle, it remains so?

All of you guys are perfectly right. My question however, was, in instance of the explanation of the charges, how the charges interact with each other when there's no physical contact between them.

I did do a reading on virtual photons. The concept seems to be clearer. But, considering that they're 'virtual', can we rely on that explanation?

I still don't understand how some theories consider spin quantum numbers of photons as +1 and -1, when photons are massless. How can massless particles be so stable as to move at 'c' and spin at the same time?

Aren't photons more of an energy field or plane than a single particle?

Yeah, I think it's a valid question for any kind of a field. I wonder if anything other than string theory can explain it.

According to what I've read about magnetic fields, all they're described as are imaginary lines around the magnet that depict the area where the magnet has effects upon. What exactly is a magnetic field? And how is the attraction caused?

Merged post follows:

Okay, since no one's replying to this thinking this as something amateurish, let me rephrase it.

I need someone to explain how the attraction is caused by magnets. What is the 'field'?

We think of magnetic fields as imaginary lines of force (let's say I think of it that way). How is this force caused around the magnet?

The concept of photons not existing at rest isn't very clear. Because if they did, their acceleration at one instant (from 0 to c) would approach infinity and from the next instant it would approach zero.

I did a readup on wikipedia. There it said that a particle-antiparticle pair is produced near the event horizon due to the gravitational effects. One of the pairs tunnels into the black holes, creating an illusion to the observer that a particle has also been emitted. This is what they refer to as the radiation referred to in the earlier posts?