- #1
eureka_beyond
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Homework Statement
This is a general concept question. The problem is, I don't seem to understand what the question is saying and why. Here's the question:
A mechanical wave can propagate through a medium if
a) there are attraction/ repulsion between the medium particles
b) the particles are able to vibrate about their equilibrium position
c) the particles have a net displacement when they are subjected to disturbance
Only a) and b) are correct, but why?
Thanks! =]
Homework Equations
no equations
The Attempt at a Solution
To be specific, I don't understand how there are attraction or repulsion between particles. Then I don't understand how is the vibration of particles important when they are in their equilibrium position. Thirdly, why is c) incorrect. I'm totally confused.