Can Wavelength Be Negative if Velocity is Negative in Wave Behavior of Matter?

[daivinhtran]

λ = h/(mv)

so, if the velocity is negative, how could the wavelength be negative??

 

[AGNuke]

Negative velocity? We use the magnitude of the velocity -> momentum. A wavelength is not going to change if the object is moving forward or backward with the same velocity.

 

[Borek]

λ = h/(mv)

so, if the velocity is negative, how could the wavelength be negative??

v here stands for speed, not velocity, and is always positive.