Would Dark Matter Make Us Invisible at High Speeds?

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Traveling at 60% of the speed of light in opposite directions does not render observers invisible to each other. Instead, due to the principles of relativity, the relative speed between two observers would be approximately 88.2% of the speed of light. Dark matter is not simply matter moving away faster than light; it has distinct properties and effects on the universe. The discussion emphasizes the importance of understanding relativistic velocity addition. Thus, the concept of invisibility at high speeds is a misconception based on a misunderstanding of relativity.
PRyckman
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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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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.
 
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:

\frac{0.6c+0.6c}{1+\frac{0.6c(0.6c)}{c^2}} = 0.882c

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

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In an inertial frame of reference (IFR), there are two fixed points, A and B, which share an entangled state $$ \frac{1}{\sqrt{2}}(|0>_A|1>_B+|1>_A|0>_B) $$ At point A, a measurement is made. The state then collapses to $$ |a>_A|b>_B, \{a,b\}=\{0,1\} $$ We assume that A has the state ##|a>_A## and B has ##|b>_B## simultaneously, i.e., when their synchronized clocks both read time T However, in other inertial frames, due to the relativity of simultaneity, the moment when B has ##|b>_B##...
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