22.3.3—The de Broglie wavelength as the wavelength associated with a moving

A particle with momentum p has de Broglie wavelength λ=h/p, so greater momentum means a shorter wavelength.

For a non-relativistic electron p=mv; use the momentum actually delivered by the apparatus, not simply the particle’s rest mass.

Accelerating an electron through a larger potential difference increases its speed and reduces λ, changing the diffraction scale.

The wavelength is not a path the particle visibly traces; it predicts the scale of interference and diffraction effects.