Homework of chapter 6: 1.EOC (end-of-chapter exercises): 6.44:Is the wavelength comparable to the size of an atom. h 6.626×10-34J.s = 0.0776×10-9m mv (9.1×10-31kg)×(9.38×10m/s) =7.76×10-1m=0.776A 32 That is why we can observe the diffraction phenomenon when an 0 bessasshee ® electron beam passing through a C8 crystal or a thin metal foil. Transition metals Increasing radius A AASA6A7A8A Increasing radius The wavelength matches the size of atoms! Copyright 2009 Pearson Prentice Hall,Inc.Homework of chapter 6: 1. EOC (end 1. EOC (end-of-chapter exercises): chapter exercises): 6.44: Is the wavelength comparable to the size of an atom. the wavelength comparable to the size of an atom. 34 9 31 6 11 6.626 10 0.0776 10 v (9.1 10 ) (9.38 10 / ) 7.76 10 0.776 A m h s m kg m s m J λ − − − ° − × ⋅ = = = × × × × = × = That is why we can observe observe the diffraction diffraction phenomenon phenomenon when an electron electron beam passing passing through through a crystal crystal or a thin metal foil. The wavelength matches the size of atoms!