Which of the following displacement expressions can represent an undistorted travelling wave moving with a single constant speed?
Options

Question

Which of the following displacement expressions can represent an undistorted travelling wave moving with a single constant speed?

G1 Physics · Accepted Answer

An undistorted travelling wave must be expressible as a function of x−vt or x+vt. Option A can be written as a function of x−(ω/k)t. Option B is explicitly a function of x−vt. Option C is explicitly a function of x+vt. Therefore all three expressions can represent travelling waves. Correct option: D.