Light -wave or particle?

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Presentation transcript:

Light -wave or particle? PHYSICS 1 Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http://www.cts.iitkgp.ernet.in/~phy1/

The Compton Effect

Photon electron collision

Conservation of Energy

Conservation of momentum x y Square and add

Momentum and Energy

Change in wavelength

Compton Effect

Wave nature of particles De Broglie in 1924 Every particle has an associated wave

Dispersion Relation

Interpretation? Particle is localized Wave is defined everywhere Momentum is known No position energy

Electron diffraction Davison and Germer 1927 Verified wave nature of particles

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