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CHEM 1A (149)
Lecture 5

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Department
Chemistry
Course
CHEM 1A
Professor
Amanda Brindley
Semester
Winter

Description
wave or particle - is light a wave or particle? - wave interference - waves with the same phase interfere constructively (they add), two waves make a larger one together // waves with different phase interfere de- constructively (subtract) - double split experiment - coherent source - single/double slit // dark and light areas in interference pattern - einsteinʼs photoelectric effect - incoming light ejecting electrons // incoming light needs to have enough energy // energy of photons must be higher than threshold energy (min energy = work function) // violet light can eject e- from K, but red light cannot - E = hv = work function => threshold frequency // wave particle duality of light
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