60 Questions 300 Answers 0 Followers
Questions related from Chian Fan
Complex numbers are involved almost everywhere in modern physics, but the understanding of imaginary numbers has been controversial. In fact there is a process of acceptance of imaginary numbers...
01 January 1970 6,212 15 View
How does light know its speed and maintain that speed? The energy of light is E=hf, and the momentum is P=h/λ. The energy of light excites the momentum of light; the momentum of light carries the...
01 January 1970 960 24 View
Mach said [1], the principle of minimum xxxx, are they the natural purpose? Born said in his "Physics in My Generation"[2], that while it is understandable that a particle chooses the straightest...
01 January 1970 1,723 19 View
A body at rest has rest Energy, so it should also have rest Momentum. Lao Tzu said, “Gravity is the root of lightness; stillness, the ruler of movement”(重为轻根，静为躁君)*. The meaning of this statement...
01 January 1970 8,791 18 View
God said, "Let there be light." So, did God need to use many means when He created light? Physically we have to ask, "Should all processes of light generation obey the same equation?" "Is this...
01 January 1970 4,277 21 View
Does energy have an origin or root? When Plato talks about beauty in the "Hippias Major", he asks: "A beautiful young girl is beautiful", "A sturdy mare is beautiful", "A fine harp...
01 January 1970 3,057 84 View
The energy operator ih∂/∂t and the momentum operator ihΔ or ih∂/∂x play a crucial role in the derivation of the Schrödinger equation, the Klein-Gordon equation, the Dirac equation, and other...
01 January 1970 8,866 25 View
Are annihilation and pair production mutually inverse processes? p+p− → γ γ' “Annihilation can happen when all the quantum numbers of two colliding particles add up to zero. It might be...
01 January 1970 1,554 21 View
Fermions have four properties: charge, spin moment, mass and gravitational field. 1) Why don't we consider the spin moment as an effect of "magnetic charge", so that we don't need to look for...
01 January 1970 8,467 9 View
According to special relativity [1], the mass of a moving object is generally considered to be a relative value that increases with velocity [2]. m=γm0, γ is the relativistic factor and m0 is...
01 January 1970 3,070 58 View
It is commonly believed that the concept of electron spin was first introduced by A.H. Compton (1920) when he studied magnetism. "May I then conclude that the electron itself, spinning like a tiny...
01 January 1970 609 81 View
When God built the world, he needed an absolute ruler to measure space, an absolute clock to measure time. This is light. Then the light was kneaded together in space-time and became matter....
01 January 1970 5,032 11 View
Two electrons, A at rest and B moving at high speed. According to the theory of relativity, there is a "Length Contraction and Time Dilation" effect in the space-time of the electron moving at...
01 January 1970 7,675 8 View
If the transition is instantaneous, the moment the photon appears must be superluminal. In quantum mechanics, Bohr's semi-classical model, Heisenberg's matrix mechanics, and Schödinger's wave...
01 January 1970 428 38 View
01 January 1970 9,653 18 View
01 January 1970 6,292 18 View
Should this set of Constants Originate in the Equations that Dominate the Existence and Evolution of Nature? There are over 300 physical constants in physics [1][2], c, h, G, e, α, me, mp, θ, μ0,...
01 January 1970 9,914 100 View
01 January 1970 5,207 81 View
There are many kinds of certainty in the world, but there is only one kind of uncertainty. I: We can think of all mathematical arguments as "causal" arguments, where everything behaves...
01 January 1970 1,934 26 View
According to the principle that force is an exchange of "virtual particles", the "graviton" appears only when an object enters the gravitational field, how does it appear? Where is the "graviton"...
01 January 1970 8,409 9 View
Noether's theorem is a fundamental result in physics stating that every symmetry of the dynamics implies a conservation law. It is, however, deficient in several respects: for one, it is not...
01 January 1970 4,622 12 View
01 January 1970 9,871 19 View
Do we need to find a motivation for symmetry: {?} → {invariance} → {conservation} → {symmetry} → Should there be an ultimate symmetry that is identical to the conservation, structure invariance,...
01 January 1970 2,466 26 View
01 January 1970 1,204 58 View
Paradox 1 - The Laws of Physics Invalidate Themselves, When They Enter the Singularity Controlled by Themselves. Paradox 2 - The Collapse of Matter Caused by the Law of Gravity Will Eventually...
01 January 1970 1,250 15 View
01 January 1970 8,753 25 View
01 January 1970 4,170 99 View
From the earliest Pythagorean (~570BCE-~490BCE) view that "everything is number" [1], to the founder of modern physics, Galileo (1564-1642), who said "the book of nature is written in the language...
01 January 1970 5,755 7 View
Zero stands for emptiness, for nothing, and yet it is considered to be one of the greatest achievements of humankind. It took a long stretch of human history for it to be recognized and...
01 January 1970 5,125 9 View
01 January 1970 6,001 38 View
01 January 1970 2,914 11 View
01 January 1970 1,428 24 View
01 January 1970 2,204 21 View
01 January 1970 7,032 16 View
If magnetic monopoles do not annihilate*, do magnetic monopoles still exist? If magnetic monopoles do not exist, how should magnetism be described? Is it a bipolar magnetic charge? If it is a...
01 January 1970 2,519 4 View
What are the criteria for determining whether an elementary particle is elementary? "What is an elementary particle?" This seemingly simple question has no clear answer; this seemingly...
01 January 1970 9,833 6 View
The second law of thermodynamics - No process is possible, the sole result of which is that heat is transferred from a body to a hotter one (Clausius)[1]. Black-hole physics mirrors thermodynamics...
01 January 1970 4,327 0 View
If it is true that space-time is expanding, how does the measure of space-time change? The shape of space-time is the shape of the universe; how can expansion without a boundary be called...
01 January 1970 352 24 View
First of all, we must concede the "variability" of space-time, and it's a physical reality. First, this is the common ground of both the Special and General Theory of Relativity; the main body of...
01 January 1970 5,706 19 View
01 January 1970 7,771 9 View
We assume that any N-dimensional space can have an (N-1)-dimensional "boundary". However, if the boundary is limited to points, lines, and surfaces, and not to bodies, then three-dimensional space...
01 January 1970 6,620 8 View
01 January 1970 1,494 21 View
01 January 1970 1,516 100 View
How did Photons Construct Light? Our entire description of photons is based on energy Eo=hν [1], momentum Po=h/λ [2], and Helicity and Massless. we are not sure of the wave function Ψo(t,x) of...
01 January 1970 256 48 View
Can Physical Constants Which Are Obtained with Combinations of Fundamental Physical Constants Have a More Fundamental Nature? Planck Scales (Planck's 'units of measurement') are different...
01 January 1970 2,445 22 View
Is the Fine-Structure Constant the Most Fundamental Physical Constant? The fine-structure constant is obtained when the classical Bohr atomic model is relativisticized [1][2]. α=e2/ℏc, a number...
01 January 1970 1,613 16 View
“According to general theory of relativity, gravitation is not a force but a property of spacetime geometry. A test particle and light move in response to the geometry of the spacetime.”[1]...
01 January 1970 5,989 21 View
General Relativity field equations [1]: Gµν = G*Tµν...... (EQ.1). It is a relation between the matter field (energy-momentum field) Tµν and the spacetime field Gµν, where the gravitational...
01 January 1970 315 21 View
The external spacetime field produced by an object of mass M, the Schwarzschild spacetime metric solution, is usually obtained as follows [1]: 1) Assumes a spherically symmetric spacetime metric,...
01 January 1970 8,600 11 View
01 January 1970 900 8 View
What is the Relationship Between Vacuum and Space? The historical evolution of the concept of "vacuum" [1] can be roughly described as the following. 0) Buddhist Vacuum: the void formlessness,...
01 January 1970 5,236 23 View
The concept of quantization in physics begins with the expression E=hν, P=h/λ obtained from the blackbody radiation law, where h is the minimum amount of action [1]. Since there is a mass-energy...
01 January 1970 3,436 19 View
Is Uniqueness Their Common and Only Correct Answer? I. We often say that xx has no physical meaning or has physical meaning. So what is "physical meaning" and what is the meaning of "physical...
01 January 1970 3,702 8 View
Einstein field equations [1]: Rµν - (1/2)gµνR + Λgµν = Tµν ...... (EQ.1) where Λ is the cosmological constant, gµν is the spacetime metric, and Rµν is the Ricci tensor. EQ.1 expresses the...
01 January 1970 8,453 14 View
In his article "More is different", Anderson said that new laws of physics "emerge" at each physical level and new properties appear [1]; Wheeler, when claiming that "law without law" and "order...
01 January 1970 3,072 10 View
If gravity is caused by spacetime, then negative gravity should also be caused by spacetime. If general relativity is correct, then it should be able to describe all spacetime types and describe...
01 January 1970 3,800 17 View
Free spacetime contains no energy-momentum*, so when objects m are travelling at constant velocity in it, they do not exchange energy-momentum. Non-free spacetime contains energy-momentum. The...
01 January 1970 1,020 25 View
In the Standard Model, if we ignore the unverifiable property of colour charge and consider neutrinos as ‘dark matter particles’ for the time being [1], then we can consider fermions to have the...
01 January 1970 5,670 24 View
No matter what the nature of spacetime is, continuous or discrete, peaceful or fluctuating, we can assume that there does not need to be another "spacetime" behind spacetime. According to the...
01 January 1970 9,155 6 View
Gravitational waves are ripples of spacetime propagating at the speed of light [1]. A gravitational wave can be described as a small perturbation hμν on a flat spacetime metric ημν [2]:...
01 January 1970 2,534 13 View
