Freund und ich hatten letztens eine Theorie?
Letztens im phyisk Unterricht : es wurde uns erklärt das sich Licht in Wellen ausbreitet. Und dabei haben wir überlegt das sich das Universum immer weiter ausbreitet und dadurch dass im Weltraum keine Hindernisse gibt haben wir uns gefragt wenn Sicht das Universum weiter ausbreitet und an das Licht sich mit ausbreitet ob das immer weiter verblasst oder ob dass immer kürzer wird weil ja immer wieder neues hinzugefügt wird. Wir nahmen das Szenario von einen gummiartigen Objekt wenn man ein Strich draufmacht und dan am gummiartigen Objekt von allen Seiten gezogen wird das dieser Strich ja auch dann verblasst. Also was passiert dann wird dass Licht immer weiter verblassen oder kürzer oder passiert gar nichts?
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Four points:
So the energy will not “be left, it will remain. But the stars could move so far that we could only see a part. Therefore an interesting reflection of you, only from the “Gummituchmodell” you would better bridge.
Read on Wikipedia to the above keywords!
Speaking: This branch of physics is called cosmology. Have you ever thought of studying physics?
Thanks for this detailed answer you randomly studied physics
Yes, sir!
the wavelengths expand on the way with the space. Calls red shift. And not only the wavelengths:
There are two distances from galaxies:
The distance from the luminosity also follows objects with known brightness (so-called standard candles, e.g. Supernovae) (Luminosity Distance rL)
The distance that follows from the angle into which an object of known absolute size fits (Angular Distance rA).
With the help of the red shift z there is a simple relationship between both, Etherington’s Distance Duality Equation (which is independent of the exact expansion model:
rA/rL = 1/(1 + z)^2
It follows that in the vicinity, for z < < < 1, the angular distance behaves approximately as much as the luminosity distance, that thus more distant objects of the same type appear smaller, as usual, that for larger z but the angular distance falls behind the luminosity distance and the objects no longer appear smaller. rA thus decreases with increasing distance and the objects even appear larger.
A clear justification is that a galaxy retains its absolute size because of its gravitative bond, but its image of emitted light follows the expansion, and it blows up on the journey to the observer by the same factor (1+z) as the wavelength.
When seeking to spread the light radially, this is almost always the case, it becomes weaker at length. This has nothing to do with red shift or something. That’s what your picture fits for me.
The light or the waves do not fade.
the light becomes longer and thus less energy
It “does not fade” – an absorption should take place.
The line on the rubber also does not fade, only gaps are built in, which is why the harder is visible. You’ve got less line per surface – that’s what happens in the light… at least like that.
The rubber object is therefore not so wrong. If you paint a line on it and break the object, the object expands and the line on it becomes longer and small gaps come in. If you do not paint a line, but a waveform (for example, sine wave), the gaps not only come in, but the distances between the maxima of the wave become larger, which means that the wavelength becomes greater.
In light, among other things (not exclusively!) the same happens through the expansion of the universe. The keyword would be “red shift (cosmology)”.
What is left with the gaps and the apparent?
If you are exposed to a spherical light source which also radiates spherically, you will have more and more surface that will be irradiated with increasing distance from the light source. As with the rubber object the area becomes larger and since small gaps arise between the previously painted line, the density is reduced here with increasing distance. The line on the rubber object does not fade – but the individual color points are no longer close enough together than you perceive them as clearly visible. They also say the opacity decreases.
As the cover force of the color decreases here, the luminosity becomes lower with increasing distance from the light source. To be exact with the square of distance. The individual light beam does not become weaker, but it is no longer sufficiently close to each other, as a result of which the appearance of the “loss” arises.
However, it has practically seen a very similar effect. You don’t see the light anymore, because your eyes need a certain luminosity to perceive light as such.
Very good question and well thought out!
Correct answers have already been given, the wavelength of the electromagnetic wave becomes longer – in the direction of red.
But please note one! This is not a Doppler effect due to the escape movement of the light source (away galaxies), but a direct effect of the expansion of the space, which acts directly on the photons.
Attention: Doppler effects are also available, although only near light sources. Thus, the light of Andromeda is shifted towards blue due to the movement in our direction (short wavelength)
Not only the universe expands everything in the universe. Even a customs stick. It constantly expands and the distances between the individual markings of course the same. Only we do not notice this because we are constantly expanding – becoming bigger and wider. We also do not notice this because of our own expansion. And so it happens with light waves that constantly expand.