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## Main Question or Discussion Point

We can mathematically derive the equation of wave,

[itex]\frac{\partial^2 y}{\partial t^2} = v^2 \frac{\partial^2 y}{\partial x^2}[/itex], where [itex]v[/itex] is the velocity of wave propagation.

Can we prove this equation physically (not just taking derivatives of the equation of wave, but making physical meaning in every steps)?

[itex]\frac{\partial^2 y}{\partial t^2} = v^2 \frac{\partial^2 y}{\partial x^2}[/itex], where [itex]v[/itex] is the velocity of wave propagation.

Can we prove this equation physically (not just taking derivatives of the equation of wave, but making physical meaning in every steps)?