Funny similarities between a ball and the expanding universe

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SUMMARY

The discussion highlights the analogy between a bouncing rubber ball and the accelerating expansion of the universe. As the ball bounces, it loses energy while the sound of its impact increases due to shorter intervals between bounces, creating an illusion of acceleration despite its deceleration. The user acknowledges that while these phenomena are not directly related, the similarities are intriguing. Ultimately, the conversation concludes with a recognition of the limited scope for further discussion on the topic.

PREREQUISITES
  • Understanding of basic physics concepts such as energy loss and acceleration.
  • Familiarity with the principles of sound propagation.
  • Knowledge of cosmology, specifically the concept of the expanding universe.
  • Awareness of the distinction between illusion and reality in physical phenomena.
NEXT STEPS
  • Research the principles of energy conservation in elastic collisions.
  • Explore the concept of cosmic expansion and its implications in modern cosmology.
  • Learn about sound waves and their behavior in different mediums.
  • Investigate the psychological aspects of perception and illusion in physics.
USEFUL FOR

Students of physics, cosmologists, and anyone interested in the relationship between physical phenomena and perception will benefit from this discussion.

Wandelgart
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A rubber ball is bouncing on a flat surface. Every time it bounces, it loses energy, while the sound of the ball hitting the surface accelerates (because the intervals of the ball impacting the surface become shorter with each bounce). The ball seems to be accelerating when, in fact, it is slowing down.
I know the evidence for an accelerating expansion of the universe and what I have just written are not linked, but I find the similarities interesting. In the ball's case, it is just an illusion.
 
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Wandelgart said:
I know the evidence for an accelerating expansion of the universe and what I have just written are not linked
Yes. So there is not much left to discuss about it.

Thread closed.
 

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