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- 2. Einstein’s special theory of relativity when dealing with particle speeds comparable to the speed of light.
- 3. As physicists sought new ways to solve these puzzles, another revolution took place in physics between
- 4. Blackbody Radiation and Planck’s Hypothesis An object at any temperature emits electromagnetic waves in the form
- 5. Blackbody Radiation and Planck’s Hypothesis The following two consistent experimental findings were seen as especially significant
- 6. Blackbody Radiation and Planck’s Hypothesis 2. The peak of the wavelength distribution shifts to shorter wavelengths
- 7. Blackbody Radiation and Planck’s Hypothesis To describe the distribution of energy from a black body, we
- 8. Blackbody Radiation and Planck’s Hypothesis In 1900, Max Planck developed a theory of blackbody radiation that
- 9. Blackbody Radiation and Planck’s Hypothesis • The oscillators emit or absorb energy when making a transition
- 10. Blackbody Radiation and Planck’s Hypothesis An oscillator emits or absorbs energy only when it changes quantum
- 11. Blackbody Radiation and Planck’s Hypothesis
- 12. The Photoelectric Effect Blackbody radiation was the first phenomenon to be explained with a quantum model.
- 13. The Photoelectric Effect ΔVs is the stopping potential
- 14. The Photoelectric Effect In Einstein’s model of the photoelectric effect, a photon of the incident light
- 15. The Photoelectric Effect Rearranging the equation: cutoff wavelength λc cutoff frequency fc, Einstein assumed light (or
- 16. The Photoelectric Effect
- 17. The Compton Effect Because different electrons move at different speeds after the interaction, depending on the
- 18. The Compton Effect the Compton shift equation the Compton wavelength of the electron
- 19. The Compton Effect
- 20. The Nature of Electromagnetic Waves Phenomena such as the photoelectric effect and the Compton effect offer
- 21. The Nature of Electromagnetic Waves Some experiments can be explained either better or solely with the
- 22. The Wave Properties of Particles Every large-scale observation can be interpreted by considering either a wave
- 23. The Wave Properties of Particles Furthermore, in analogy with photons, de Broglie postulated that particles obey
- 24. The Wave Properties of Particles The Davisson–Germer Experiment The experiment involved the scattering of low-energy electrons
- 25. The Wave Properties of Particles The Davisson–Germer Experiment
- 26. The Wave Properties of Particles The Davisson–Germer Experiment Shortly thereafter, Davisson and Germer performed more extensive
- 27. The Wave Properties of Particles The Electron Microscope A practical device that relies on the wave
- 28. A New Model: The Quantum Particle Because in the past we considered the particle and wave
- 29. A New Model: The Quantum Particle Let’s first recall some characteristics of ideal particles and ideal
- 30. A New Model: The Quantum Particle If a large number of waves are combined, the result
- 31. A New Model: The Quantum Particle The second cosine factor represents a wave with a wave
- 32. A New Model: The Quantum Particle For an individual wave, the speed is given by This
- 33. A New Model: The Quantum Particle The group speed, or the speed of the wave packet
- 34. A New Model: The Quantum Particle The group speed of the wave packet is identical to
- 35. The Double-Slit Experiment Revisited The dual nature of the electron is clearly shown in this experiment:
- 36. The Double-Slit Experiment Revisited
- 37. The Uncertainty Principle Whenever one measures the position or velocity of a particle at any instant,
- 38. The Uncertainty Principle If a measurement of the position of a particle is made with uncertainty
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