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

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SUMMARY

The discussion centers on the relationship between wavelength (λ) and velocity (v) in wave behavior of matter, specifically using the formula λ = h/(mv). It is established that while velocity can be negative, it is the magnitude of velocity that is relevant for calculating momentum, thus ensuring that wavelength remains positive. The participants clarify that in this context, 'v' refers to speed, which is always a positive value, reinforcing that wavelength cannot be negative regardless of the direction of motion.

PREREQUISITES
  • Understanding of wave-particle duality in quantum mechanics
  • Familiarity with the de Broglie wavelength concept
  • Knowledge of momentum and its relation to velocity
  • Basic grasp of the Planck constant (h)
NEXT STEPS
  • Study the implications of de Broglie wavelength in quantum mechanics
  • Learn about the differences between speed and velocity in physics
  • Explore the concept of momentum in wave behavior
  • Investigate the role of the Planck constant in quantum equations
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Students and professionals in physics, particularly those studying quantum mechanics, wave behavior, and the principles of wave-particle duality.

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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