- #1
miew
- 27
- 0
Homework Statement
Sorry I tried to use Latex but it didn't work out :/
Make the change of variables r = x + vt and s = x vt in the wave equation
partial^2y/partialx^2-(1/v^2)(partial^2y/partialt^2)=0
Homework Equations
partialy/patialx=(partialy/partialr)(partialr/partialx)+(partialy/partials)(partials/partialx)
partialy/partialy=(partialy/partialr)(partialr/partialt)+(partialy/partials)(partials/partialy)
partialr/partialx=1
partials/partialx=1
partialr/partialt=v
partials/partialt=-v
The Attempt at a Solution
I am a little bit confused about what to do. This is what I did:
Rearranging:
partial^2y/partialr^2(1-1/v)+partial^2y/partials^2(1+1/v)=0
I feel this is completely wrong, but I can't think of another way of doing it.