Skip to content

Posts from Academy of Sciences of Heroesland

5.0 (1 rating)
Open
Should I accept the White Guard’s offer?
30 voters
Single choice Public votes
Sign in to participate in this poll.
Poll results will be visible after you vote or when the poll closes.
In reply to Ment
User Avatar
15 years ago
Auto-translated
Ment
It wasn't obvious. It was believed that Galilean transformations applied to light.
I'm not talking about what was believed a certain number of years ago, but about the fact that the speed of light does not exceed 300,000 km/s, and it's interesting to know where this speed came from.
Ment
And even earlier, it was believed that light propagated instantaneously.
And even earlier, it was believed that the Earth was flat and the sun revolved around it.
15 years ago
Auto-translated
Vayshan
And even earlier, it was believed that the Earth was flat and the sun revolved around it.
And some believe so even now :)
Elcidere
The attempts of a person to explain nature with numbers are amusing.
Here, by the way, it's not entirely about numbers. If we are still talking about physics, then almost every theory is based on some kind of equations. However, these are equations of a different nature, not numbers like the ones we are used to from the school algebra course, such as x^2+x=0. These so-called differential equations describe the behavior of a system in a rather general sense, and, if I may say so, characterize certain laws. These laws can manifest themselves in different ways, depending on different conditions that are taken into account when solving the equation (in mathematics and physics, they are called boundary and initial conditions). It is clear, for example, that in a room with sound-absorbing walls, sound will propagate differently than if the walls perfectly reflected sound. The laws of sound propagation remain the same, but to obtain a particular solution, it is necessary to take into account the properties of the environment in each specific case, and the results will be different.

So, in my opinion, all this seemingly abstract mathematics helps to describe the surrounding world quite accurately and universally, and personally, it doesn't seem so naive to me :)
In reply to Майор Вихрь
User Avatar
15 years ago
Auto-translated
Major Whirlwind

Here's something that isn't entirely about numbers. If we're still talking about physics, then almost every theory is based on some kind of equation. However, these are equations of a different kind, not the numerical ones we're used to from school algebra, like x^2+x=0. These so-called differential equations describe the behavior of a system in a rather general sense, and, if I may say so, characterize certain laws. These laws can manifest themselves in different ways, depending on the different conditions that are taken into account when solving the equation (in mathematics and physics, these are called boundary and initial conditions). It's clear, for example, that in a room with sound-absorbing walls, sound will propagate differently than if the walls perfectly reflected sound. The laws of sound propagation remain the same, but to obtain a particular solution, it is necessary to take into account the properties of the environment in each specific case, and the results will be different.

So, in my opinion, all this seemingly abstract mathematics helps to describe the surrounding world quite accurately and universally, and personally, I don't think it's so naive.
The question was posed slightly differently: people aren't trying to explain the nature of phenomena with numbers, but differential equations and other equations simply describe processes without explaining them. However, I don't quite understand the meaning of the phrase "explaining the nature with numbers"; in science, some fundamental non-numerical phenomena are usually used.
User Avatar
15 years ago
Auto-translated
Yes, indeed, 300,000 – it’s a suspiciously round, beautiful number.
In reply to Hermit
User Avatar
15 years ago
Auto-translated
Hermit
Yes, indeed, 300,000 – it’s some suspiciously whole, beautiful number.
It’s an approximate value. Always yours, Captain.
Major Whirlwind
Here, by the way, it’s not entirely about numbers. If we’re still talking about physics, then almost every theory is based on some kind of equation. True, these are equations of a different nature, not numbers like we’re used to from the school algebra course, like x^2+x=0. These so-called differential equations describe the behavior of a system in a rather general sense, and, if I may say so, characterize certain laws. These laws can manifest themselves in different ways, depending on the different conditions that are taken into account when solving the equation (in mathematics and physics, they are called boundary and initial conditions). It is clear, for example, that in a room with sound-absorbing walls, sound will propagate differently than if the walls perfectly reflected sound. The laws of sound propagation remain the same, but to obtain a particular solution, it is necessary to take into account the properties of the environment in each specific case, and the results will be different.
Equations, even if they are differential, are still numbers, but in a more general form.
Although I am not against such a "numerical" description of things. After all, a person needs to somehow imagine physics in order to use it in practice.
User Avatar
15 years ago
Auto-translated
Nope, that's Hermit, the captain.
In reply to Hermit
User Avatar
15 years ago
Auto-translated
Hermit
Yes, indeed, 300,000 – it’s some suspiciously round, beautiful number.
299,792,458 m/s – that’s the harsh reality.
User Avatar
15 years ago
Auto-translated
But even approximately, it's only 300000 - 299792 = 208 km/s less. Compared to 300000, that's very little. I think it's not much more than the measurement error. I don't even remember how they measured it. They probably used some kind of water, split a beam into two parts, and sent one along the flow and the other against it, or something like that...
User Avatar
15 years ago
Auto-translated
Some astronomer was the first to measure it. He calculated the difference in the time it takes for light to travel from an object to Earth when that distance is smaller and when it is larger.

Added after 43 seconds
Just think, only 208 km/s.
User Avatar
15 years ago
Auto-translated
Today, February 18, 2011, at 14:05 Moscow time, I received in the library my full permanent six-month loan book
LANDAU, LIFSHITZ "Field Theory"
Hooray! :D :D :D :D :D
User Avatar
15 years ago
Auto-translated
With the authors' autographs!
User Avatar
15 years ago
Auto-translated
Director's cut with bonus content.
In reply to Amko
User Avatar
15 years ago
Auto-translated
Find the bonus code under the cover and send an SMS to 314314; maybe you’re the one who’s meant to win the grand prize!
User Avatar
15 years ago
Auto-translated
Ment, are you suggesting we discuss the theory of fields?
In reply to Саня Изи
15 years ago
Auto-translated
Lord_de_Sat
Ment, are you suggesting we discuss the theory of fields?
Tell me more about the fifth spiritual dimension. Or whatever it's called.

Statistics

Welcome our newest member: recijeb