Wave-Particle Duality • e/m radiation exhibits diffraction and interference => wave-like • particles behave quite differently - follow well defined paths and do not produce interference patterns • when << size of opening, wave behaves like a particle • light exchanges energy in “lumps” or ‘quanta’ just like particles
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Wave-Particle Duality e/m radiation exhibits diffraction and interference => wave-like particles behave quite differently - follow well defined paths and.
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Wave-Particle Duality• e/m radiation exhibits diffraction and interference
=> wave-like
• particles behave quite differently - follow well defined paths and do not produce interference patterns
• when << size of opening, wave behaves like a particle
• light exchanges energy in “lumps” or ‘quanta’ just like particles
Water waves flare out when passing through opening of width a
a
Wave-Particle Duality• 1900: sound, light, e/m radiation were waves• electrons, protons, atoms were particles• 1930: quantum mechanics provided a new interpretation• light behaves as a particle: photoelectric & Compton effect • E=hf = hc/ p=h/• particles behave as waves: electron diffraction• => localized packets of energy => particle-like• f, “wave-particle duality” E,p