Confusion between waves and particles, which one is vibrating?

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Homework Help Overview

The discussion revolves around the concepts of waves and particles, particularly in the context of mechanical waves. The original poster expresses confusion regarding the relationship between waves and the particles in a medium, specifically questioning which is actually vibrating and how they interact. Additionally, there is a query about the distinction between pulse waves and periodic waves.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the nature of waves versus particles, questioning whether waves themselves vibrate or if it is solely the particles in the medium that do. There is an attempt to clarify the relationship between sine waves and particle motion, as well as the definitions of pulse waves and periodic waves.

Discussion Status

Some participants have offered insights into the nature of waves as disturbances in a medium, suggesting that it is the particles that vibrate due to energy propagation. However, there remains uncertainty about the distinction between waves and particles, with ongoing exploration of these concepts.

Contextual Notes

Participants are grappling with foundational definitions and relationships in wave mechanics, indicating a need for further clarification on the concepts being discussed.

MIA6
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1. A wave whose particles vibrate perpendicularly to the direction it is traveling is called transverse wave. Here is my question, in the mechanical waves, I am sort of confused with 'wave' and 'particles in the medium'? Which one is really vibrating? It is said that sine waves describe particles vibrating with simple harmonic motion. I don't know what's the relationship between wave and particles. For example, a pebble is dropped into a pond, and particles in the medium, water molecules move in vertical circles as waves pass. What's the relations betweeen water molecules and waves?
2. Is that the difference between 'pulse wave' and 'periodic wave' is one consists of only one pulse, the other one consists of many pulses, just like a sine wave?

Thanks for helping me.
 
Last edited:
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Can anyone help me with my first question?
 
MIA6 said:
1. A wave whose particles vibrate perpendicularly to the direction it is traveling is called transverse wave. Here is my question, in the mechanical waves, I am sort of confused with 'wave' and 'particles in the medium'? Which one is really vibrating? It is said that sine waves describe particles vibrating with simple harmonic motion. I don't know what's the relationship between wave and particles. For example, a pebble is dropped into a pond, and particles in the medium, water molecules move in vertical circles as waves pass. What's the relations betweeen water molecules and waves?
2. Is that the difference between 'pulse wave' and 'periodic wave' is one consists of only one pulse, the other one consists of many pulses, just like a sine wave?

Thanks for helping me.

Ok, I will try:

1. First, wave is not a particle(something that you can see, touch, or something that has mass). It is just prorogation of energy/ or is a disturbance created in a medium.
So, it's the particles that are vibrating. And they vibrate due to the energy that is passing through the medium.

Don't consider waves as something

:rolleyes: I can't explain more than that.
 
rootX said:
Ok, I will try:

1. First, wave is not a particle(something that you can see, touch, or something that has mass). It is just prorogation of energy/ or is a disturbance created in a medium.
So, it's the particles that are vibrating. And they vibrate due to the energy that is passing through the medium.

Don't consider waves as something

:rolleyes: I can't explain more than that.

Thanks. I sort of get what you said. Wave is a disturbance, and when it happens, it makes the particles around it move, and these are particles actually vibrating. So the wave graph like sine wave that we have seen describes the movement of particles? Because I always thought that sine wave describes the movement of wave, not particles. i always imagine a wave like a sine wave, a rope, and it moves up and down. So wave is just an energy that makes the particles in the medium move? But it's still hard to figure out the difference between wave and particles separately. They are like a whole thing.
 
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So wave is just an energy that makes the particles in the medium move?
>yes, that's right! :PSo the wave graph like sine wave that we have seen describes the movement of particles?
>It's the movement of one particle.
 
A wave whose particles vibrate perpendicularly to the direction it is traveling is called transverse wave. Look at this definition, it seems that particles are included in 'wave'? like wave contains particles? As I said, it's hard to find out the boundary between wave and particles.
 

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