Is y = a[log(x - vt)] a Traveling Wave? Understanding the General Wave Equation

In summary, the equation y = a[log(x-vt)] does not represent a traveling wave because it is not a harmonic function. To determine if both sides are equal, one can use the d'Alembertian operator \Box to see if it yields a non-relativistic solution with v replacing c. This equation represents a broader class of solutions than just harmonic functions.
  • #1
Amith2006
427
2
Sir,
Does the equation,
y = a[log(x – vt)]
Represent a traveling wave?
I think the answer is No, because it is not a harmonic function. Is it right?
 
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  • #2
Why don't you just plug it in the d'Alembertian operator and see if both sides are equal?
[tex]\Box = \nabla^2 - { 1 \over c^2} \frac{ \partial^2} { \partial t^2}[/tex]
 
  • #3
Reshma said:
Why don't you just plug it in the d'Alembertian operator and see if both sides are equal?
[tex]\Box = \nabla^2 - { 1 \over c^2} \frac{ \partial^2} { \partial t^2}[/tex]

Yes with [itex]\Box^{2}y = 0[/itex] and the c replaced by v of course so its really a non-relativistic d'Alembertian.

But more than that you should know what CLASS of solutions can be solutions of the wave equation...harmonic functions is a subset of this class.
 
Last edited:

Related to Is y = a[log(x - vt)] a Traveling Wave? Understanding the General Wave Equation

1. What is the general wave equation and how does it relate to traveling waves?

The general wave equation is a mathematical formula that describes the behavior of waves in various physical systems. It can be used to model both traveling and standing waves, but in the case of traveling waves, the equation takes the form of y = a[log(x - vt)]. This equation represents a wave that is moving in the positive x direction with a velocity of v.

2. How is y = a[log(x - vt)] different from other forms of the general wave equation?

The general wave equation can take on different forms depending on the type of wave being modeled. The form y = a[log(x - vt)] specifically describes a traveling wave, while other forms may represent standing waves or other types of waves. The log function in this equation is what allows the wave to travel with a constant velocity, while other forms may use sine or cosine functions to represent oscillating waves.

3. What do the variables in y = a[log(x - vt)] represent?

In this equation, y represents the displacement of the wave at a given point in space, x represents the position along the wave, a represents the amplitude or maximum displacement of the wave, v represents the velocity of the wave, and t represents time. These variables are all important factors in determining the behavior of the traveling wave.

4. Is y = a[log(x - vt)] a linear or nonlinear equation?

This equation is nonlinear, as the log function is a nonlinear function. This means that the graph of the equation will not be a straight line, but will exhibit curvature. Nonlinear equations can be more complex to solve, but they also allow for more accurate modeling of real-world phenomena.

5. How can the general wave equation be applied in real-world situations?

The general wave equation has many applications in physics, engineering, and other fields. It can be used to model various types of waves, including sound, light, and water waves. Understanding this equation allows scientists and engineers to predict and manipulate the behavior of waves in different systems, which can have practical applications in fields such as telecommunications, acoustics, and oceanography.

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