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

AI Thread Summary
The discussion centers on the equation λ = h/(mv), which relates wavelength (λ) to Planck's constant (h), mass (m), and velocity (v). A key point raised is the confusion surrounding negative velocity and its implications for wavelength. It is clarified that in this context, "v" refers to speed, which is always a positive value. Consequently, the wavelength remains unchanged regardless of the direction of motion, as it is dependent on the magnitude of momentum rather than the vector nature of velocity.
daivinhtran
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λ = h/(mv)

so, if the velocity is negative, how could the wavelength be negative??
 
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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.
 
daivinhtran said:
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.
 

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