Can Dark Energy Be Described as a Force?

The effect of dark energy is most accurately described as an acceleration of the expansion of the universe. This acceleration is represented by the cosmological constant, Λ, in Einstein's equations. In summary, the force of expansion in the universe is not actually a force, as objects moving with the Hubble flow are following geodesics with no applied force. Similarly, dark energy is not a force, but rather a contribution to the overall spacetime geometry that accelerates the expansion of the universe. This acceleration is represented by the cosmological constant, Λ, in Einstein's equations.
  • #1
Quarlep
257
4
1/2 mv2 kinetic energy of expansion and force will beΩ
m(dv/dt)=m((dH/dt)D+H2D). Thats the force of expansion. But have can we describe the force of dark energy ? I thought F=P/S P=ωρc2 then force will be F=-ρc2/R2 am I right ? (ρ=dark energy density)
 
Space news on Phys.org
  • #2
Quarlep said:
1/2 mv2 kinetic energy of expansion and force will beΩ
m(dv/dt)=m((dH/dt)D+H2D). Thats the force of expansion.

No, it isn't. Expansion is not a force; objects which are moving with the Hubble flow are moving along geodesics, with no applied force at all.

Quarlep said:
can we describe the force of dark energy ?

Dark energy isn't a force either; it's just a contribution to the overall spacetime geometry that determines the Hubble flow.
 
  • #3
Cant we show them like force I know there's no force theorytically
 
  • #4
Quarlep said:
Cant we show them like force I know there's no force theorytically

No. "Force" would imply either non-geodesic motion, or a non-inertial frame in which a comoving object's coordinate acceleration was nonzero. Neither of those applies to what you are suggesting.
 

FAQ: Can Dark Energy Be Described as a Force?

1. What is dark energy?

Dark energy is a theoretical form of energy that is believed to make up about 70% of the total energy in the universe. It is thought to be responsible for the accelerating expansion of the universe.

2. How is dark energy different from regular energy?

Dark energy is different from regular energy in that it does not interact with matter or electromagnetic radiation, making it difficult to detect or study. It is also thought to have negative pressure, which is counterintuitive to our understanding of energy.

3. How was dark energy discovered?

Dark energy was first proposed by scientists studying the expansion of the universe in the late 1990s. The discovery was made by analyzing the brightness of distant supernovae and observing that they appear to be moving away from us at an accelerating rate.

4. What is the leading theory for the origin of dark energy?

The leading theory for the origin of dark energy is the cosmological constant, which was first introduced by Albert Einstein in his theory of general relativity. It suggests that empty space has a constant energy density that drives the expansion of the universe.

5. Why is dark energy important to our understanding of the universe?

Dark energy is important because it is believed to have a major influence on the evolution and fate of the universe. It is also a major mystery in physics, as scientists are still trying to understand its nature and how it fits into our current understanding of the universe.

Similar threads

I Voids, dark energy and tidal forces...?
Replies
0
Views
1K
I Does dark-energy require a source of energy?
Replies
2
Views
2K
B Could Dark Energy be an (unknown) dark force acting at great distances?
Replies
7
Views
2K
I Is there any mechanism possible for the Big Brake?
Replies
4
Views
2K
I Questions about Negative Pressure and Vacuum Energy
Replies
5
Views
2K
B Does dark energy's effect or strength vary over time?
Replies
24
Views
2K
I Dark Energy as repulsive gravity
Replies
6
Views
2K
B How do the candidates for Dark Energy 'work'?
Replies
4
Views
2K
I What is the energy density of spacetime?
Replies
20
Views
3K
B Some more basic questions on Dark Energy
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top