Lecture Notes (Photoelectric Effect & X-Rays) - Dickey Physics

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$Lecture Notes (Light Diffraction) - Dickey Physics$

Shortest Wavelengths (Most energetic photons) Longest Wavelengths (Least energetic photons) PE Dilemma: - the PE presented physicists with a problem; according to classical wave theory, light consists of EM waves extending continuously throughout space - this worked well in explaining such wave characteristics as polarization, reflection, refraction, interference, and diffraction - Maxwell's ideas, however, could not explain the PE
- Einstein's theory said that light energy is bundled into discrete units now called photons; Einstein's theory worked to explain the PE, but could not explain interference of light - the result is two models of light whose basic ideas contradict one another; one says light behaves like a wave; the other said it acts like a particle X-<strong>Rays</strong>: - X-ray radiation was discovered in 1895 by a German physicist named Wilhelm Röntgen - like the PE, it too did not fit with classical physics theories - it eventually required the idea of quanta to completely explain their effects - the discovery of X-rays, which were often called Röntgen rays, had important consequences for atomic physics, medicine, and technology - Röntgen discovered X-rays while experimenting with cathode ray tubes; he noticed that a screen coated with a fluorescent material (barium platinocyanide) glowed from something being emitted by the cathode ray tube
Page 1 and 2: Lecture Notes (Photoelectric Effect
Page 3 and 4: - depending upon the metal and the
Page 5 and 6: Photoelectricity Experimental Summa
Page 7 and 8: - Einstein also said that the elect
Page 9: - Planck discussed this idea in 190
Page 13: - to test their wave nature a diffr

Lecture Notes (Photoelectric Effect & X-Rays) - Dickey Physics

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