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

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Wave-particle duality
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Define wave-particle duality

Light & matter can exhibit both wave & particle properties

Wave properties of light

Diffraction and interference

Evidence of light's particle properties

Photoelectric effect (light acts as photons)

Electron diffraction pattern shape

Concentric rings

De Broglie wavelength equation

λ=hmv\lambda = \frac{h}{mv}

Value of Planck's constant hh

6.63×10346.63 \times 10^{-34} Js

In λ=hmv\lambda = \frac{h}{mv}, what is mm?

Mass of the particle

In λ=hmv\lambda = \frac{h}{mv}, what is vv?

Velocity of the particle

Effect of higher momentum on wavelength

Shorter wavelength, less diffraction

Effect of lower momentum on wavelength

Longer wavelength, more diffraction

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