Questions tagged [physics]

Physics is the natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.

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16
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12answers
10k views

What are some arguments against the brain-in-a-vat thought experiment?

I read this article about how this guy in Switzerland did an experiment that he thought proved the Simulation Hypothesis of reality (link: http://arxiv.org/abs/1210.1847). I have also been reading ...
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2answers
95 views

Physical correlates of consciousness

The term neural correlates of consciousness is well established (~ 277,000 Google results, one Wikipedia article), but I'd like to ask for more general physical correlates of consciousness (~ 6,000 ...
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1answer
356 views

Are mathematical suppositions of physical theories determined uniquely according to Aristotle and Plato?

Does mathematics apply to physics in one way or multiple ways? What do Aristotle and Plato think? It would seem that Aristotle thinks mathematics can be applied to physics in one way only because, ...
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3answers
589 views

Aristotle's Physics: Why do objects strike the ground harder when dropped from higher?

It's my understanding that Aristotle believed 1) that gravity is a constant force toward the center of the earth, and 2) forces cause objects to move but not accelerate. It seems to me if those are ...
2
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3answers
542 views

Nothing, God & Physical law

Mary-Jane Rubenstein writes in Cosmic Singularities At first blush, Hawking’s and Mlodinow’s “nothing” seems even more of a nothing than the church fathers’ nothing. For whereas Irenaeus’ and ...
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1answer
295 views

How is the causality of mind consistent with the law of conservation of energy?

How is the causality of mind consistent with the law of conservation of energy? Intuitively, the mind can influence the physical world (with causality), and it is hard to see how such causality does ...
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2answers
124 views

What's the difference between logical modalities and physical modalities?

I am just wondering what's the difference between the two. I would say that there is something different, but honestly I can't define what it is exactly. What do you think?
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1answer
215 views

I could prove: Copenhagen QM is NOT causal. Is my argument acceptable?

A quantum system consists of some states. It is in all of the states but beCAUSE of the act of the measurement, the wavefunction collapses into one state. I am really confused because I can repeat the ...
4
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7answers
541 views

What is the basis for attributing discontinuity to space-time?

Speaking of the discrete orbits of electrons, Bertrand Russell asks the following: "Do we know that, between one orbit and the next, other orbits are geometrically possible? Einstein has led us ...
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1answer
94 views

According to physics, do our visual thoughts (possibly others) appear to be not real because they occupy physically inaccessible higher dimensions?

I wanted to know how physics explain the mind.I will first share my thoughts on whether thoughts are real or that the mind is real (Mind is the arena where we have thoughts). I think we usually ...
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1answer
35 views

Limit of energy? [closed]

What if there is any real limit of energy that can ever be accumulated in the gravitational field? Described as: E(max) = m(max) * c^2 So... If some black hole reached that limit, (I would expect) ...
4
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1answer
120 views

What kind of philosophy of the foundations of physics can there be?

I'm currently trying to read into topos foundations for theories of physics and I wonder if we are really able to give a philosophical foundation for what a possible future theory of physics should ...
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4answers
292 views

Is it true that we are almost certainly Boltzmann Brains?

I read an article and I got curious about the topic of Boltzmann Brains. I read some more articles and posts about the topic and it seems to me that the arguments are that BBs would outnumber us by ...
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2answers
103 views

What is Robert Nozick alluding to by a “vast generalization” of Feynman’s path integral?

I was reading a book from the philosopher Robert Nozick (Invariances: The Structure of the Objective World), and there was something that confused me. Around page 159 he argues that every logically ...
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2answers
100 views

Perpetual Division

I recall a story about a philosopher who proposed an idea that everything is essentially perpetually divisible. That is to say, you can divide a whole into two halves and for each half (regarded as ...
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3answers
145 views

What are the benefits of three dimensional space? [closed]

In zero dimensional space, differentiation is impossible. It's necessary (as far as we know) for things to be in two different places to distinguish between them. So, as Euclid says, a point is that ...
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1answer
68 views

What is the historical relationship between physics and philosophy?

I often hear people say that physics is/was part of philosophy or that philosophy gave birth to physics but I think this isn't correct. Imagine a big country called anonati. After a civil war, ...
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7answers
3k views

Is it theoretically possible for a bottomless pits to exist in a finite universe?

Assuming that our universe is finite, is it still theoretically possible to have a bottomless pit? This all really depends on the definition of bottomless pit. I don't know that I can accurately ...
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1answer
124 views

Does the reversibility of laws of physics prove that causality doesn't exist?

Does the fact that the fundamental laws are symmetric with respect to direction of time show that causation does not exist? Since causality always requires the cause to precede the effect, but laws of ...
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0answers
202 views

Is it there any theory or model in theoretical physics that is akin to Tegmark's Mathematical Universe Hypothesis?

Physicist Max Tegmark proposed a hypothesis that asserts that all mathematical structures do exist as universes. (https://en.wikipedia.org/wiki/Mathematical_universe_hypothesis) But this hypothesis ...
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0answers
123 views

Did Wheeler's “It from Bit” allow inconsistencies to exist?

Physicist John Wheeler proposed a model of the universe based on "It from Bit" asserting that the world is fundamentally information. I've been told both that Wheeler's It from Bit is compatible with ...
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0answers
84 views

What is the meaning of using a mathematical structure to describe physics?

I'm trying to understand the meaning of using a mathematical structure in order to do physics, what does this really mean? My idea is that first we performs experiments on a physical system in order ...
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4answers
700 views

Philosophy - Does Einstein's Block Universe theory prove Nietzsche's Eternal Return theory is true?

If the Past, Present, and Future all exist in exactly the same way, then every single moment would be a ‘Now’ moment for me. it would also mean that me being dead in the future is equally real in the ...
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2answers
358 views

What would the existence of the multiverse mean for theology?

The multiverse seems to be gaining traction of the scientific community, even becoming the prevalent worldview. It seems some types of the multiverse theory, such as the many-worlds interpretation, ...
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0answers
66 views

Can we measure “braverity” objectively?

By saying "bravery/courage", we implicitly mean a hard task that we wouldn't do it in daily life, and we have to sacrifice something to get it - we are scared. It is, after all, just a cost-benefit ...
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0answers
83 views

What were Hegel's criticisms of Newton?

I recently read this thread THREAD describing the relationship between Hegel and Newton. Apparently, Hegel misread Newton's principia, and criticized a specific point of science on Newton. This is ...
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5answers
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Is the delayed choice quantum eraser a refutation of principle of causality? How does contemporary philosophy make sense of it?

Causality, as per Wiki Is the relation between an event (the cause) and a second event (the effect), where the first event is understood to be responsible for the second. For this relationship ...
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3answers
2k views

What would a fractal universe tell us about Time?

To begin with let's look at what is known as the coastline paradox. Briefly it goes like this: If you measure the circumference of Britain with a 1km long stick, and then do the same with a 100m long ...
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3answers
118 views

If the universe is flat, how can the Earth be round? [closed]

Just another silly question that may deserve a wise answer.
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2answers
153 views

Why is modern physics still connected to Western notions of time? [closed]

as Rasheedah Phillips says “Afrofuturism uses a completely different construct of time and engages a different notion of time consciousness and notion of the future than does the European brand of ...
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5answers
5k views

What is the opposite of the reductionist approach?

I am searching for two opposite words in philosophy of science to describe two opposite approaches in physics. To illustrate what I am searching for I will use statistical physics and particle physics ...
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2answers
329 views

What is the most basic thing? [closed]

I wanted to know that what is the most basic or the basicestest thing that makes up the universe? Just like a wall is made up of bricks and bricks are made up of atoms and atoms are made up of ...
4
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2answers
90 views

Are all unobservables in physics very small?

Are all unobservables in physics very small? I think I've read that the interior of the sun is an unobservable, and so entity realists like Ian Hacking have to claim we can't know anything at all ...
4
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4answers
225 views

Why are physical laws so simple?

Many of the most general physical laws are very simple, from Einstein's law of General Relativity to Schrodinger's Equation in quantum mechanics. Why aren't are most basic physical laws incredibly ...
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3answers
1k views

Philosophy - Does the block universe theory of time mean that life will repeat after death?

I have suffered severe anxiety, sadness, regret, and depression since I was 13, I had 2 trapped-feeling panic attacks when I was 13 I am now 17 and fighting off frequent urges to have a trapped-...
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7answers
1k views

How much philosophy should a physicist know?

I began to read Hawking's recent book 'A Grand Design' some time ago and noticed that he savages philosophy. He says '...philosophy is dead. Philosophy has not kept up with modern developments in ...
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1answer
244 views

Epicureanism and speed of light

I have heard that Epicurus stated that light has the speed of thought. What did he mean by this? My hypothesis is he intended to say, in a way, that the speed of light is infinite. But then, why was ...
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2answers
298 views

How would you describe the relationship of science and philosophy of science?

How would you describe the relationship of science and philosophy of science? Is it a worldview that sets a tone to scientific jargon? I mean that statements of eg. physics are under submission of the ...
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5answers
3k views

Can we be Boltzmann brains? Or, how can we be sure there is no conspiracy about the past?

The way things are traditionally presented about time, there is the present, the past is fixed, and the future is open. The second law of thermodynamics is invoked. But how can we be so sure the past ...
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1answer
217 views

Where does the sense of self come from?

We human beings experience a sense of identity, an inner personality. I assume Machines and computers do not. Animals also seem to possess consciousness and some sort of sense of self. Where does ...
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2answers
395 views

Can something be really random?

Before you tag my question as a duplicate I want to make sure you understand it. Earlier I saw a video about Schrödinger's cat that says once we open the box to see if the cat were alive or dead the ...
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2answers
254 views

Does Alvin Plantinga's solution to the problem of divine action entail a total denial of the applicability of Newtonian physics to the world?

Alvin Plantinga offers at least two major solutions to the problem of divine action; that physical laws of the Newtonian sort are (often implicitly) qualified to apply only to causally closed systems, ...
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5answers
736 views

Can anything truly be simultaneous?

I was looking at a discussion about simultaneous causation and something that came up was that all physical processes take time. So nothing can truly be simultaneous. And yet, we have philosophers ...
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1answer
117 views

If time is going to end, then did it have a beginning? How do we know time will end?

Why do most physicists believe time is finite? What proof do we have that time is not infinite and therefore will never end? And how can 'time' actually come into existence if something coming into ...
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1answer
192 views

Philosophy - Is Nietzsche's Eternal Return theory true?

Is Nietzsche's Eternal Return theory true? I am extremely worried that it is because of the very likely fact that Einstein's Block Universe theory is true, and what renders Einstein's Block Universe ...
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1answer
141 views

Philosophy - If both the Rebound Universe and Block Universe theories are true would that mean Nietzsche's Eternal Return theory true?

If the Block Universe is true, and if the Rebound Universe is also true where the universe goes from Big Crunch to Big bang then doesn't that mean that the Block Universe is shaped like a circle where ...
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12answers
9k views

Why is the complex number an integral part of physical reality?

In modern physics, the quantum wave distribution function necessarily uses complex numbers to represent itself. If physics defines the physical reality, then what we are saying by the statement above ...
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5answers
293 views

Why do physicists increasingly seek to understand more fundamental pieces of matter?

Why do physicists seek to study and explain more fundamental qualities of matter as opposed to stopping at a certain point and testing more predictions of macro-level models? What benefit does the "...
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6answers
2k views

Does all matter exist forever?

I was reading about non-duality (spirituality / philosophy) that discusses the idea that everything in reality is one, since any matter can become any other matter, (a tree can become a chair and a ...
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3answers
391 views

Is there a fundamental ontology in Physics? What is the universe fundamentally “made of” according to Physics?

Is there a fundamental ontology in Physics? According to Physics, what are the fundamental "things" (whatever they may be) that in combination define the whole universe, such that they are not ...