The transverse displacement $y(x, t)$ of a wave on a string is given by $y(x, t)=e^{-\left(a x^2+b t^2+2 \sqrt{a b} x t\right)}$ This represents a
  • Awave moving in $-x$ direction, speed $\sqrt{\frac{b}{a}}$
  • Bstanding wave of frequency $\sqrt{b}$
  • Cstanding wave of frequency $\frac{1}{\sqrt{b}}$
  • Dwave moving in $+x$ direction, speed $\sqrt{\frac{a}{b}}$
Medium
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