- #1
dyn
- 773
- 61
Hi.
I am working through " A Student's guide to waves " by Fleisch. In deriving the wave equation for a longitudinal wave it uses
dψ = (∂ψ/∂x) dx
where ψ is the displacement but ψ is a function of x and t ; so shouldn't this equation be
dψ = (∂ψ/∂x) dx + (∂ψ/∂t) dt
Thanks
I am working through " A Student's guide to waves " by Fleisch. In deriving the wave equation for a longitudinal wave it uses
dψ = (∂ψ/∂x) dx
where ψ is the displacement but ψ is a function of x and t ; so shouldn't this equation be
dψ = (∂ψ/∂x) dx + (∂ψ/∂t) dt
Thanks