Does a 1D Line Have Physical Width in Physics?

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SUMMARY

A one-dimensional (1D) line possesses length but lacks physical width, as established in the discussion. The concept of dimensionality indicates that while 1D lines can be infinitely subdivided mathematically, they do not translate to physical dimensions in reality. The conversation highlights the confusion surrounding the implications of 1D lines on two-dimensional (2D) objects, emphasizing that a 2D object, composed of infinitely many 1D lines, does not imply it has infinite length or size.

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Tarantula
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Hey!
I have some dumb-smart question
Does 1D line have physical width?
My logic says that mathematically you can go smaller and smaller,but I see there being a problem with 1D having infinitly small width in physics.

If 2D object has infinitly many 1D lines that would suggest that 2D object is also infinitly long/large - for it not to be infinitly long
-it has to have infinitly many smaller infinitys(but that seems to be also flawed)-I draw a circle and started to pull lines from center to edge to visulise it and it seemed to work,but I don't see it being a good answer.
-otherwise it's infinitly large number that is actually a number and isn't infinity atall.
English isn't my first language ,sorry :)
 
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Welcome to PF!

Hey Tarantula! Welcome to PF! :smile:
Tarantula said:
Does 1D line have physical width?

There is no width in 1D …

so a 1D line has length but no width.

(btw, you need to use the word "a" more often :wink:)

If 2D object has infinitly many 1D lines that would suggest that 2D object is also infinitly long/large - for it not to be infinitly long
-it has to have infinitly many smaller infinitys(but that seems to be also flawed)-I draw a circle and started to pull lines from center to edge to visulise it and it seemed to work,but I don't see it being a good answer.

Sorry, I don't understand. :redface:
 

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