- Thread starter
-
- #121
Attachments
-
light.jpg
Whats the speed of dark ?
- Thread starter Geedee
- Start date
Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
at6
1st Sergeant
You said it first.
Njaco
The Pop-Tart Whisperer
Ok, who started THIS thread back up??? Come on, tell me, don't hide in the dark!!!!
.
.
![](data:image/svg+xml;charset=utf-8,<svg height="381px" width="400px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
at6
1st Sergeant
Sorry Njaco, I don't know. They left me totally in the dark.
Last edited:
Boa
Airman
So... if you already are there, how fast are you going?
Oh no, this is the forum's darkest hour...
GrauGeist
Generalfeldmarschall zur Luftschiff Abteilung
Sooo...if there was a title song for this thread, would it be "Fade to Black"?
mikewint
Captain
Speed/Velocity are of course relative terms depending on your reference point. An aircraft traveling at 600mph is doing so only from an Earth frame of refenence. Switch frames and it is stationary while the Earth moves under it. It's all Relative
But, the speed of light is constant, irrespective of the viewers frame of reference. Is it the same with the speed of dark?
parsifal
Colonel
Light does have some strange physical properties. you cant apply standard Newtonian physics to the way it moves, including its speed, or the way it behaves, such as around extreme gravitational or magnetic fields. by rights, as its speed approaches C, its mass should also approach infinite. Of course it doesn't, suggesting it doesn't have any mass to begin with. but then, it has properties suggesting that it is particulate, which then suggests mass.
On a related, but different vein, Hawking has suggested that the proof that the Universe is finite is that the sky at night is dark. if it were infinite, the sky would be white. there is a problem with this, however, as many physicists, for various reasons have pointed out. It suggests that light always travels in a straight line, which we now think it does not. it fails to appreciate that space is full of obstructions and particles that may block the passage of light. It also fails to take into account that light, whether as a wave or a particle, might eventually run out of puff...remember Newtons laws are seriously challenged by this stuff.....Energy might be created and it might be destroyed.
This stuff can seriously mess with your sanity if you put too much thought to it...They are coming I know they are coming....
On a related, but different vein, Hawking has suggested that the proof that the Universe is finite is that the sky at night is dark. if it were infinite, the sky would be white. there is a problem with this, however, as many physicists, for various reasons have pointed out. It suggests that light always travels in a straight line, which we now think it does not. it fails to appreciate that space is full of obstructions and particles that may block the passage of light. It also fails to take into account that light, whether as a wave or a particle, might eventually run out of puff...remember Newtons laws are seriously challenged by this stuff.....Energy might be created and it might be destroyed.
This stuff can seriously mess with your sanity if you put too much thought to it...They are coming I know they are coming....
GrauGeist
Generalfeldmarschall zur Luftschiff Abteilung
Yes indeed!
at6
1st Sergeant
I just had this thought which might a little convoluted. If light can be bent, what about dark?
parsifal
Colonel
well, if its a serious question, then for this discussion, dark can be described as a 'lack of light. can a "lack of light" be bent. No, it cant, but the light around it can be bent, such that the position of the dark is apparently moved.
Talking about the dark is similar to talking about nothing as a "something". Not having something is talk about nothing. Does that mean nothing is something?
We can of course discuss Dark Energy or Dark matter if we want to discuss the general term "dark". In physical cosmology and astronomy, dark energy is a hypothetical form of energy which permeates all of space and tends to accelerate the expansion of the universe. Dark energy is the most accepted hypothesis to explain the observations since the 1990s indicating that the universe is expanding at an accelerating rate. According to the Planck mission team, and based on the standard model of cosmology, on a mass–energy equivalence basis, the observable universe contains 26.8% dark matter, 68.3% dark energy (for a total of 95.1%) and 4.9% ordinary matter. Again on a mass–energy equivalence basis, the density of dark energy (1.67 × 10−27 kg/m3) is very low: in the solar system, it is estimated only 6 tons of dark energy would be found within the radius of Pluto's orbit. However, it comes to dominate the mass–energy of the universe because it is uniform across space.
Two proposed forms for dark energy are the cosmological constant, a constant energy density filling space homogeneously, and scalar fields such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space. Contributions from scalar fields that are constant in space are usually also included in the cosmological constant. The cosmological constant can be formulated to be equivalent to vacuum energy. Scalar fields that do change in space can be difficult to distinguish from a cosmological constant because the change may be extremely slow.
I didnt write this, and I only understand bits of it.
Told you this stuff is dangerous for mental health reasons.....
Talking about the dark is similar to talking about nothing as a "something". Not having something is talk about nothing. Does that mean nothing is something?
We can of course discuss Dark Energy or Dark matter if we want to discuss the general term "dark". In physical cosmology and astronomy, dark energy is a hypothetical form of energy which permeates all of space and tends to accelerate the expansion of the universe. Dark energy is the most accepted hypothesis to explain the observations since the 1990s indicating that the universe is expanding at an accelerating rate. According to the Planck mission team, and based on the standard model of cosmology, on a mass–energy equivalence basis, the observable universe contains 26.8% dark matter, 68.3% dark energy (for a total of 95.1%) and 4.9% ordinary matter. Again on a mass–energy equivalence basis, the density of dark energy (1.67 × 10−27 kg/m3) is very low: in the solar system, it is estimated only 6 tons of dark energy would be found within the radius of Pluto's orbit. However, it comes to dominate the mass–energy of the universe because it is uniform across space.
Two proposed forms for dark energy are the cosmological constant, a constant energy density filling space homogeneously, and scalar fields such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space. Contributions from scalar fields that are constant in space are usually also included in the cosmological constant. The cosmological constant can be formulated to be equivalent to vacuum energy. Scalar fields that do change in space can be difficult to distinguish from a cosmological constant because the change may be extremely slow.
I didnt write this, and I only understand bits of it.
Told you this stuff is dangerous for mental health reasons.....
Last edited:
GrauGeist
Generalfeldmarschall zur Luftschiff Abteilung
The bigger question would be: how would you be able to tell you're bending dark...if there's no light to see it?
My head is spinning....I can't tell light from Dark anymore....
An interesting bit of information. Did you know that it is easy to convert light into dark?
By the simple method of stacking two polarising filters, rotating one of the filters varies the amount of light that is converted. try it at home folks!
By the simple method of stacking two polarising filters, rotating one of the filters varies the amount of light that is converted. try it at home folks!
![](data:image/svg+xml;charset=utf-8,<svg height="16px" width="16px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)