Light wave or particle Somnath Bharadwaj and Pratik

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

The Compton Effect Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Photon electron collision Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Conservation of Energy Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Conservation of momentum x y Square and add Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Momentum and Energy Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Change in wavelength Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Compton Effect Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Wave nature of particles De Broglie in 1924 Every particle has an associated wave Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Dispersion Relation Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Interpretation? • • Particle is localized Wave is defined everywhere Momentum is known No position energy Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/

Electron diffraction Davison and Germer 1927 Verified wave nature of particles Ó Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http: //www. cts. iitkgp. ernet. in/~phy 1/