Edward F. Redish
(a) Change the variables in the equation from x, t to ξ, η ("xi" and "eta") where
(b) Show that any arbitrary pair of functions (as long as they have two well-defined derivatives) f and g lead to a solution of the wave equation
(c) Rewrite y of the solution in part (b) as a function of x and t. Interpret f and g physically, explaining why you interpet them as you do.
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Last revision 7. November, 2005.