Would Dark Matter Make Us Invisible at High Speeds?

In summary, if two objects are traveling at 60% of the speed of light in opposite directions, they would not be invisible to each other. This is because the speed of light has a definite speed from any frame of reference. However, the perceived speed of the other object would be 0.882 times the speed of light from each object's perspective, according to the principles of Relativity. Dark matter is not simply matter that is moving faster than the speed of light, but rather has properties that make it difficult to detect or see.
  • #1
PRyckman
134
0
If I was traveling 60% of light speed in one direction,
and you were traveling 60% of light speed in another direction
We would be invisible to each other correct ?

Is that all that dark matter is? matter in which the distance between us is increasing faster than light speed?
 
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  • #2
PRyckman said:
If I was traveling 60% of light speed in one direction,
and you were traveling 60% of light speed in another direction
We would be invisible to each other correct ?

Is that all that dark matter is? matter in which the distance between us is increasing faster than light speed?
No, the speed of light as viewed from any frame of reference has a definite speed c.
 
  • #3
PRyckman said:
If I was traveling 60% of light speed in one direction,
and you were traveling 60% of light speed in another direction
We would be invisible to each other correct ?
No, in fact, from each of our perpectives, the other would only be traveling at:

[tex]\frac{0.6c+0.6c}{1+\frac{0.6c(0.6c)}{c^2}} = 0.882c[/tex]

relative to ourselves. This is how velocities add under Relativity.
 

FAQ: Would Dark Matter Make Us Invisible at High Speeds?

What is dark matter?

Dark matter is a type of matter that is thought to make up about 85% of the total matter in the universe. It does not emit or absorb light, so it cannot be seen directly, but its presence is inferred through its gravitational effects on visible matter.

How is dark matter related to velocity?

Dark matter is related to velocity because its gravitational effects can be observed in the velocities of stars and galaxies. Scientists have found that the velocity of stars and gas in galaxies is much higher than what would be expected based on the visible mass of the galaxy, indicating the presence of dark matter.

What is the evidence for the existence of dark matter?

There are several lines of evidence for the existence of dark matter. These include observations of the rotation curves of galaxies, gravitational lensing, and the cosmic microwave background radiation. All of these observations suggest the presence of a large amount of invisible mass in the universe.

How does dark matter affect the expansion of the universe?

Dark matter does not directly affect the expansion of the universe, but it does play a role in the overall structure and evolution of the universe. Its gravitational effects help to pull matter together, leading to the formation of galaxies and clusters of galaxies. This can also affect the expansion rate of the universe on a larger scale.

Can dark matter be detected?

Dark matter cannot be detected directly, but scientists are working on ways to indirectly detect its presence. This includes experiments such as the Large Hadron Collider, which aims to produce dark matter particles, and detectors that look for signals of dark matter interactions in underground laboratories.

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