Birth of Quantum Mechanics - Diffraction Seong Jin Son Min Jae
Gang 2015.05.13 Slide 2 -Matter wave De Broglie -Explain Bohrs atom
model -What is a diffraction? -What if electron is just a particle?
-Davisson-Germer Experiment -G. P. Thomson Experiment Slide 3
Matter wave De Broglie Slide 4 Bohrs atom model Slide 5 What is a
diffraction? Slide 6 Light does not alwa ys travel in a straig ht
line. It tends to bend aro und objects. This t endency is called di
ffraction. Any wave will do thi s, including matter waves and
acoustic waves. Shadow of a hand illuminated b y a Helium-Neo n
laser Shadow of a zinc oxide crystal illumi nated by a electrons
Slide 7 Why Its Hard to See Diffraction Diffraction tends to cause
ripples at edges. But a point source is required to see this
effect. A large source masks them. Rays from a point sou rce yield,
in principle, a perfect shadow of th e hole, allowing diffrac tion
ripples to be seen. Screen with hole Example: a large source (like
the sun) casts blurry shadows, mask ing the diffraction ripples.
Rays from other regio ns of the source blur t he shadow. Slide 8
What if electron is just a particle? Slide 9 Davisson-Germer
Experiment Slide 10 G. P. Thomson Experiment Slide 11 Comparison
with wave equation Where, H is Hamiltonian operatior Slide 12 Thank
you
