Most misunderstood physics concept

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Discussion Overview

The discussion revolves around identifying the most misunderstood concepts in physics, with participants considering various areas including quantum mechanics (QM), relativity, classical mechanics, and thermodynamics. The conversation explores misconceptions held by different audiences, such as the general public, students, and even professionals in related fields.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants suggest that concepts in QM and relativity are often misunderstood, citing examples like time dilation and the nature of wave function collapse.
  • Misunderstandings about classical physics concepts, such as Newton's first law and the distinction between energy and power, are highlighted by others.
  • Participants mention the confusion surrounding mass and weight, as well as the properties of singularities in black holes.
  • There are claims that the Copenhagen interpretation of QM is frequently misrepresented by popularizers, leading to further misunderstandings.
  • Some participants express that misconceptions about entropy and its interpretation are prevalent, with one describing it in an informal manner as "jigglyness per cubic meter."
  • The discussion includes a mention of the Big Bang theory and its tendency to breed misunderstandings among both laypeople and educated individuals.
  • Concerns are raised about the wording of certain physics problems, which may contribute to confusion, particularly regarding concepts like the aircraft on a moving conveyor belt.

Areas of Agreement / Disagreement

Participants do not reach a consensus on a single most misunderstood concept; instead, multiple competing views and examples are presented, indicating a variety of perspectives on the topic.

Contextual Notes

Some participants note that misunderstandings may stem from the complexity of the concepts and the historical context in which they were developed. Additionally, there are references to the challenges of conveying nuanced physics ideas to a general audience.

Who May Find This Useful

This discussion may be of interest to educators, students, and anyone curious about common misconceptions in physics, as well as those looking to understand the challenges of communicating complex scientific ideas.

  • #61
Two items come to mind:

1. For the "Average Joe," I suggest the atom whirl symbol which falsely depicts electrons as merely particles orbiting.
upload_2017-4-25_20-49-55.jpeg

2. That straight lines exist.
 
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  • #62
A lot of the stuff you guys are talking about goes over my head and I'm graduating with my BS in physics in a couple of weeks. I'm not the greatest student but I am going to grad school. I guess that's just a sign that I need to work harder.
 
  • #63
PhDeezNutz said:
A lot of the stuff you guys are talking about goes over my head and I'm graduating with my BS in physics in a couple of weeks. I'm not the greatest student but I am going to grad school. I guess that's just a sign that I need to work harder.

Going into grad school thinking you don't understand anything is probably the best way to start out. :D
 
  • #64
Greg Bernhardt said:
What do you think is the most misunderstood concept in physics and why? I'm guessing it's something in QM or relativity, but maybe somewhere else?
Hi Greg,
This is my first ever post on a Physics Forum.
For me the thing I have most difficulty understanding is quantum entanglement.
Is it at all possible that the two particles could in fact be just a single particle?
I like the spinning coin analogy that says if you observe on side of the coin as 'heads', the other side must be 'tails'
The moment you observe the qualities of one particle, you instantly know the qualities of the other.
But could it be that the two entangled particles were really only one particle with opposite qualities?
The quantum world is so strange it seems that almost anything is possible.
 
  • #65
Bandersnatch said:
And to stay on topic, for the most misunderstood concept, I nominate Big Bang. It seems especially prone to breeding misplaced sense of understanding both in laymen and in people who should know better. I blame the name.
Fred Hoyle is still causing problems with Big Bang 60 years after he derisively named the concept...:biggrin:
 
  • #66
entropy.
 
  • #67
John Robert Manley said:
Is it at all possible that the two particles could in fact be just a single particle?
No.
You can even entangle completely different things, like an atom and a photon.
 
  • #68
In fact, if your friend observes a particle, she will then be entangled with the particle, and you can find out the state of the particle simply by asking your friend.
 

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