What is the speed of dark? (space)

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Discussion Overview

The discussion centers around the concept of "the speed of dark," exploring whether darkness has a speed and how it relates to the speed of light. Participants engage in a philosophical and conceptual examination of darkness, light, and their properties, with implications for physics and theoretical scenarios.

Discussion Character

  • Philosophical, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that darkness is the absence of light, suggesting that it cannot be added or removed faster than the speed of light (c).
  • Others argue that darkness could be considered instantaneous, as it is always present but blocked by photons, implying that it appears when light is removed.
  • A few participants assert that the speed of darkness is equivalent to the speed of light, as it arrives with the departure of light.
  • Some contributions emphasize that the speed of light in a vacuum is a constant and cannot change, while its speed in different media can vary.
  • There is a suggestion that the concept of darkness is not well-defined, leading to philosophical interpretations rather than scientific ones.
  • One participant claims that the speed of darkness is zero, arguing that it does not propagate or travel in any way.
  • Another viewpoint suggests that darkness could theoretically exceed the speed of light, as it carries no energy or information.
  • There are discussions about the implications of black holes and whether darkness can be associated with them in terms of speed.
  • Some participants question the relationship between space, energy, and information, particularly in the context of celestial bodies like the Earth and the Sun.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the nature of darkness or its speed. Multiple competing views remain, with some asserting that darkness has a speed while others claim it does not.

Contextual Notes

The discussion includes various interpretations of darkness, its relationship to light, and the implications of these concepts in physics. There are unresolved questions regarding definitions and the philosophical nature of the topic.

Blair
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My question is what is the speed of dark?

Does space the black of space have a speed?

Many Thanks
Blair Styles
 
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darkness is the absense of light
so in that aspect it always everywhere, but can't be added or removed faster than c.
 
try c...
 
k

Chronos said:
try c...
c can change
what i was saying given the speed of c in the environment darkness is limited by it.
 
or you could say that darkness is instantious and that light is just in the way of it but it is there its just that photons are blocking it and that when they are gone it is instnatly there.
 
Darkness is the abscence of light, therefore the speed of darkness is the speed it arrives, therefore the same as the speed of the departure of light. The speed of darkness = the speed of light
 
Tom McCurdy said:
c can change

c, the speed of light in vacuum, is a fundamental constant of nature, to wit 299.792.458 m/s precisely (because it defines the meter). So it cannot change. The speed of light in a can change though depending on the medium.
 
It depnds what you mean by the 'speed of dark as it could be interpreted in sevral ways. For example there is no limit on the coordinate velocity of a shadow.
 
da_willem said:
c, the speed of light in vacuum, is a fundamental constant of nature, to wit 299.792.458 m/s precisely (because it defines the meter). So it cannot change. The speed of light in a can change though depending on the medium.

So you're the one that has found the "precise" speed of light in a vacuum. I look foward to reading your papers. I'm espically interested in how you created a perfect vacuum to test it. Maybe you should have said the approximate speed of light in a vacuum is ...and what's this part about it defining the meter?

The speed of darkness is 0. It does not move, travel, or propigate in any way. It may appear that way, and the comments saying it is relative to the speed of light seem consistent with our observations. One might ask what is the speed of no electricity in a conductor.
 
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  • #10
when I said c changes it was assumed i meant in accordance with different mediums
 
  • #11
It's really just a matter of notation but c is the value of the speed of light in vacuum. So it's better to say, the speed of light (not c) is different for different media.

About the speed of light in a vacuum; it is exactly 299792458 m/s because it is the definition of the meter. A meter is the distance light travels in a vacuum in 1/299792458 second. So If the speed of light in vacuum turns out to be a little different than previously measured this changes the distance of one meter and not the constant c!
 
  • #12
GOD__AM said:
So you're the one that has found the "precise" speed of light in a vacuum. I look forward to reading your papers. I'm espically interested in how you created a perfect vacuum to test it. Maybe you should have said the approximate speed of light in a vacuum is ...and what's this part about it defining the meter?

The speed of darkness is 0. It does not move, travel, or propigate in any way. It may appear that way, and the comments saying it is relative to the speed of light seem consistent with our observations. One might ask what is the speed of no electricity in a conductor.

My next question is based on the statement that you said "The speed of darkness is 0".
My question is if this is true then what about a black hole's does it move in space if the answer is yes then i must ask again.
What is the speed of dark?
 
  • #13
"Dark" is not a well-defined physical concept, so this thread cannot possibly be anything but philosophical. I am thus moving it.

- Warren
 
  • #14
chroot said:
"Dark" is not a well-defined physical concept, so this thread cannot possibly be anything but philosophical. I am thus moving it.

- Warren

Thank you for moving my post i was unable to define my question as to ascertaining the right place to ask if space can be used as a form of energy by using the sound from a planet to generate enough power to start a black hole thus traveling in time.

Many Thanks
Blair Styles
11:11
 
  • #15
Darkness is a well defined physical concept it is the absense of light, duh! However, the vacuum flux guarantees their will always be some small amount of light as long as there is spacetime. Hence, what we call darkness is relative and obeys the Uncertainty Principle. This means, of course, that it's speed can be greater than that of light, especially since it carries no energy or information.
 
  • #16
wuliheron said:
Darkness is a well defined physical concept it is the absense of light, duh! However, the vacuum flux guarantees their will always be some small amount of light as long as there is spacetime. Hence, what we call darkness is relative and obeys the Uncertainty Principle. This means, of course, that it's speed can be greater than that of light, especially since it carries no energy or information.

Space had information in it?
What about planet Earth and the sun they full of information and can also generate energy that energy can be used as power or am i way off?

http://www.planetware.de/octave/sun.html
If the sun makes a sound then that energy must move in space or does space move the energy?
 
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  • #17
Blair said:
Thank you for moving my post i was unable to define my question as to ascertaining the right place to ask if space can be used as a form of energy by using the sound from a planet to generate enough power to start a black hole thus traveling in time.
Ohhh... well, in that case, this belongs in TD, and you deserve a warning. Personal theories are not welcome here, and you are thus in violation of PF guidelines. This is a science website, not a science fiction website.

- Warren
 

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