LectureQ4

LectureQ4 - Chapter 4 Last time we discovered that...

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4/7/2004 H133 Spring 2004 1 Chapter 4 Last time we discovered that sometimes we must treat light as a wave and sometimes we need to treat it as a particle. This is not very satisfactory after all physicists attempt to define models which are good over a wide range of circumstances (i.e. we like that Newton’s Gravity works for a falling ball on earth and can also explain the orbit of Jupiter around the sun.) Today we want to confront another problem with our view of the universe. That is the behavior of subatomic particles” (I am showing some bias) ± Protons, electrons, and neutrons These objects behave very much like particles, we can collide them into one-another and at least at low energy they act like billiard balls hitting one another. The leave definite “tracks” in particle detectors.
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4/7/2004 H133 Spring 2004 2 de Broglie Hypothesis In the early 1900’s there was plenty of evidence that small atomic and subatomic “objects” were like hard particles. Just as there had been plenty of evidence that light was a wave and physicists were surprised by the particle nature of light in the photoelectric effect, physicists were about to be surprised by the wave nature of small particles . In 1923 (about the time Compton was showing more evidence that light could act like a particle), Louise de Broglie proposed that a beam of particles (e - , protons) would display wave-like behavior (i.e. a diffraction or interference pattern). Recall from Relativity
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This note was uploaded on 06/03/2011 for the course H 133 taught by Professor Furnstahl during the Spring '11 term at Ohio State.

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LectureQ4 - Chapter 4 Last time we discovered that...

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