Wave-particle duality (AQA A-Level Physics): Flashcards

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Wave-particle duality
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de Broglie hypothesis

Particles show wave-like & particle-like properties

de Broglie wavelength formula

λ=hmv\lambda = \frac{h}{mv}

hh in de Broglie equation

Planck's constant

Wavelength vs momentum relationship

Inversely proportional

Momentum formula using wavelength

p=hλp = \frac{h}{\lambda}

What is electron diffraction?

Electrons forming diffraction patterns, showing wave behavior

Electron diffraction pattern shape

Concentric rings

KE equation for accelerated electron

12mv2=eV\frac{1}{2}mv^2 = eV

de Broglie λ\lambda with voltage formula

λ=h2meV\lambda = \frac{h}{\sqrt{2meV}}

Effect of higher voltage on λ\lambda

Wavelength decreases

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