4 Answers

  1. How do the laws of physics work? — Brilliant.
    How do these laws control all objects in the universe? — No way. They describe the observed behavior of objects in the universe and allow us to predict their behavior.

    There are no laws of physics in nature (in the universe). There are properties of the Universe unknown to us, which in most cases cannot be described within the limits of common sense, the scope of which is limited by the evolutionary experience of man. We cannot describe time, space, energy, or the quantum world in words.�

    Only in the twentieth century did we discover that time and space do not exist separately. To explain most of the modern astronomical observations, a special model of space-time in the form of a 4-dimensional pseudo-Riemannian manifold was needed. Isn't it clear to the physicist?�

    It cannot be understood because we cannot imagine it. But we can work with it using the language of physics-Einstein's equations with a certain metric — the distance between events in space-time. Long before direct observation of the expansion of the universe by redshift, the expansion of the universe was predicted by Friedman from solutions of Einstein's equations in a special metric. But what the true metric of the universe is, we still don't know. Next to black holes, the Schwarzschild metric is more applicable. If the black hole rotates, the Kerr metric starts working. All these features of the universe are not explicable from the point of view of common sense, but they are well described by the laws of physics, the predictions of which are brilliantly consistent with observations. �

    Features of the observable Universe-uniformity of time, uniformity and isotropy of space, lead to the laws of conservation of energy, momentum and angular momentum, respectively (Noether's theorem). These laws are tested to the highest precision, thus confirming the laws of symmetry inherent in the universe.

    The question concerns one of the fundamental physical constants of the universe — the speed of light (c = 299,792,458 ± 1.2 m / sec). As follows from Maxwell's equations, the speed of light is determined by the electromagnetic properties of the physical vacuum, c = 1 / √(ε₀μ₀), where ε₀ and μ₀ are the electric and magnetic constants inherent in the vacuum (space-time). In quantum electrodynamics, light is described by fundamental excitations of the electromagnetic field-photons, which, being massless particles, according to the special theory of relativity, move at the speed of light in a vacuum.

  2. The speed of light (more precisely, the speed of massless particles) is the maximum possible speed of propagation of some signal, some change from point to point. No one is “forcing” anyone to move at this speed. It's just the speed LIMIT. For example, the speed of sound propagation to a substance is the maximum speed of propagation of longitudinal vibrations. Similarly, in a vacuum there is a limiting speed of propagation of “vibrations”. If there were no such extreme speed, then there would be no fluctuations at all. Any wave requires that there is a time delay in the propagation of the change from point to point.

  3. Physicists do not discover laws, but learn them. Physicists are grown-up children who have not lost their curiosity and the question “why”. Over the years, we get more and more information about the universe, but this only raises more questions. The universe is a process that was able and we only state that our Universe was able to exist in such a form that it became possible for something conscious and capable of knowing this universe to be born inside it. And if we act wisely, and not for the benefit of profit, then in billions of years we will find a way to curb our universe. Why our universe exists – there is actually a reason for everything, starting from the very first-mass, speed. Perhaps the universe is not always the same with constant initial conditions, and perhaps next time it will not begin to expand, but will explode or collapse.

  4. The laws of physics are descriptive, not prescriptive. This is a statement of facts, not an order. And if observations show that the” law ” is sometimes not fulfilled by someone in some places, then the task of physics is to find a more adequate description, and not to force nature to comply with some “prescriptions”.

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