Is a line observable(in real life)?

AI Thread Summary
The discussion centers on the feasibility of observing a line, defined as having thickness only in one dimension, in real life. It argues that while a line with zero thickness can theoretically exist, achieving uniformity and perfection is impossible due to the inherent thickness of atoms. The criteria for "observation" are debated, suggesting that if we can observe particles like electrons through their interactions, we could similarly observe 1-dimensionality by examining the behavior of particles confined in such a space. The conversation also references quantum wires and Luttinger liquid behavior as examples of this phenomenon. Ultimately, the discussion highlights the complexity of defining and observing abstract geometric concepts in reality.
hackhard
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can a line (thickness only in 1 dimension ) be observed in real life ?
since ,at micro level , even atoms have thickness,
is it even possible to really construct a line or point or plane in reality?
 
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I don't believe so.
 
If thickness is your only concern, sure, you can have a 0 thickness line or plane in real life. Consider the top surface of a box.

But if uniformity/perfection is also a criteria, we're back to no.
 
All geometry is abstract, you'll never observe a perfect sphere, cube, line...
 
hackhard said:
can a line (thickness only in 1 dimension ) be observed in real life ?
since ,at micro level , even atoms have thickness,
is it even possible to really construct a line or point or plane in reality?

The problem here is your criteria of to "be observed". What does that mean? To observe with your eyes?

We "observe" electron via how it interacts and affect others. So, does this qualify for electrons to be "observed in real life"? Does anyone question the validity of the existence of electrons?

If we consider that we can observe electrons with such criteria, then we should also apply that same criteria in observing 1-dimensionality. In other words, what would happen IF there is such a thing as a 1-dimensional object, and how would something (particles) being confined in such a 1D space behave? Because if we know how they would behave, and we detect such behavior, would this not constitute an "observation in real life" of 1D confinement?

So, quantum wires and Luttinger liquid behavior, anyone?

Zz.
 
thanx for help
 
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