Standing Waves vs Traveling Waves

  • Context: Undergrad 
  • Thread starter Thread starter sayetsu
  • Start date Start date
  • Tags Tags
    Standing waves Waves
Click For Summary
SUMMARY

The discussion clarifies the distinction between standing waves and traveling waves, emphasizing that standing waves do not propagate like ocean waves. It highlights that photons are quantum mechanical entities and do not travel as classical waves. The conversation also addresses how energy input at one end of a string can create a standing wave along its length, despite the lack of lateral motion. Understanding these concepts requires a solid foundation in classical wave behavior.

PREREQUISITES
  • Classical wave behavior, including standing and traveling waves
  • Electromagnetic wave theory
  • Quantum mechanics fundamentals, particularly regarding photons
  • Basic principles of wave motion in fluids, such as ocean waves
NEXT STEPS
  • Study the mechanics of standing waves in strings and their formation
  • Explore the properties of electromagnetic waves and their behavior in cavities
  • Investigate the relationship between energy input and wave motion in various mediums
  • Examine the differences in motion between water molecules and wave propagation in ocean waves
USEFUL FOR

Students of physics, educators teaching wave mechanics, and anyone interested in the fundamental differences between types of waves and their behaviors in various contexts.

sayetsu
Messages
46
Reaction score
3
TL;DR
Would someone explain it, including examples?
Why is a standing wave in a string not moving toward you like an ocean wave? How do photons travel from the sun as waves? What's the difference?
 
Physics news on Phys.org
I think you should at least make an attempt to answer these questions based on some web research. Then we can answer specific questions that were raised during the course of your research. Giving you an answer when you have not built a background is pointless.
 
sayetsu said:
How do photons travel from the sun as waves?
Photons do not travel as waves. They're a purely quantum mechanical phenomenon, and aren't involved in the description of light as electromagnetic waves at all.

You will want to start by getting a thorough understanding of the classical behavior of waves (including standing and traveling waves, the first part fo your question). Until then, you should try hard to forget that you ever heard the word "photon".
 
  • Like
Likes   Reactions: hutchphd
Sorry. I admit I was being lazy. I think I get standing waves vs EM waves, but I don't get ocean waves. Why/how does a wind wave move laterally when the water molecules are moving vertically?
 
Also, I just realized there's more I don't get. How does providing energy at, say, the end of a string produce a standing wave along its entire length if there is no lateral motion?
 
sayetsu said:
Also, I just realized there's more I don't get. How does providing energy at, say, the end of a string produce a standing wave along its entire length if there is no lateral motion?
When you pluck a guitar string, does your finger displace only the point where it touches the string or the entire string? Try answering your own questions by asking intermediate questions on the path to the final answer.
 
It's also not standing waves vs. em. waves. Also em. waves can be standing waves, e.g., the em. waves in a cavity.
 
  • Like
Likes   Reactions: davenn
sayetsu said:
Also, I just realized there's more I don't get. How does providing energy at, say, the end of a string produce a standing wave along its entire length if there is no lateral motion?

Watch this video.
 
  • Like
Likes   Reactions: sophiecentaur, Motore and davenn
nsaspook said:
Watch this video.


The classic :smile:
 
  • #10
Water waves are fun to study but are somewhat different. Actually a bit of ocean water travels around an ellipse as the wave crest passes. But look at them a little later!
 
  • Like
Likes   Reactions: vanhees71

Similar threads

  • · Replies 16 ·
Replies
16
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 19 ·
Replies
19
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 3 ·
Replies
3
Views
1K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K