- #1
cfortes
- 1
- 0
Is it possible to measure the supose end of the universe with a wave that will bounce of the end of the universe and return ?
Can the End of the Universe Be Measured with a Bouncing Wave? Great Video
Click For Summary
Discussion Overview
The discussion revolves around the concept of measuring the end of the universe using a wave that could potentially bounce off a boundary and return. Participants explore the implications of the universe's expansion and the nature of observable light from distant objects.
Discussion Character
- Exploratory
- Debate/contested
Main Points Raised
- One participant questions the feasibility of measuring the supposed end of the universe with a wave, suggesting that a light wave emitted today would not return from distant objects due to their movement away from us.
- Another participant asserts that the universe does not have a boundary, implying that the concept of measuring an end is flawed.
- A different participant notes that the universe is constantly expanding, indicating that any boundary would be continually moving away, complicating measurement efforts.
- One participant mentions that estimates of the universe's size are challenging due to the limitations of observing beyond 15 billion light years.
- A reference to a video by an astrophysicist is provided, which discusses measuring the universe, though its content is not elaborated upon in the discussion.
Areas of Agreement / Disagreement
Participants express differing views on the existence of a boundary to the universe and the feasibility of measuring it with a bouncing wave. The discussion remains unresolved with multiple competing perspectives presented.
Contextual Notes
Participants highlight limitations in measuring distances in the universe due to its expansion and the nature of light from distant objects, but do not resolve these issues.
- #2
russ_watters
Mentor
- 23,870
- 11,322
Welcome to PF.
The universe does not appear to have such a boundary.
The universe does not appear to have such a boundary.
- #3
Chalnoth
Science Advisor
- 6,197
- 449
A light wave that we emitted today would not be able to return from the most distant things we can see today. Basically, we can see the ancient light that these things emitted long ago, but in the mean time they've moved so far away that we'll never be able to see the light that they emit today.cfortes said:
- #4
brother time
- 45
- 0
the universe is constantly expanding. such a boundary is always getting larger and by the time we see it, the universe is already larger than what we saw it as. many of the claimed of the size of the universe are estimates because how can we see more than 15 billion light years away.
hope this helps, BT
hope this helps, BT
- #5
ViewsofMars
- 429
- 0
Lawrence Berkeley National Laboratory has a fine video glossary. Astrophysicist David Schlegel explains about measuring the universe. You can view the video online.
http://videoglossary.lbl.gov/2010/measuring-the-universe/
http://videoglossary.lbl.gov/2010/measuring-the-universe/
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- #6
brother time
- 45
- 0
Great Video
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