Lösningsförslag: Tentamen i Modern Fysik, 5A1246, 2006-06-02
3. A linear beam of particles is normally incident onto a plate with a double-slit and
forms an interference pattern on a screen behind the double-slit. Show that any attempt to
determine (using some microscopic detector/indicator) through which slit any individual
incident particle has passed destroys the interference pattern. For simplicity assume that
the diffraction angles are small. (Hint: recall the Heisenberg microscope gedanken
experiment.) (5p)
Lösning:
4. A particle with energy E is incident onto a barrier of height U such that E
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