11. Quantum Physics.md
2024-4-11|2024-4-12
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Energy and Momentum of a Photon
- Dictation/Definition: Explain the particulate nature of electromagnetic radiation and define what a photon is. Answer:
- Formula Recall and Use: State and use the formula for the energy of a photon. Answer:
- Unit Conversion: Convert the energy of a photon from joules to electronvolts (eV). Answer:
- Understanding Photon Momentum: Explain why a photon has momentum and provide the formula for calculating it. Answer:
Photoelectric Effect
- Conceptual Understanding: Describe the photoelectric effect and the significance of the threshold frequency and threshold wavelength. Answer:
- Formula Application: In equation What is means. How to calculate threshold frequency if is given? Answer:
- Intensity vs. Kinetic Energy: Explain why the maximum kinetic energy of photoelectrons is independent of the intensity of the incident light, whereas the photoelectric current is proportional to the intensity. Answer:
Wave-Particle Duality
- Conceptual Understanding: Explain how the photoelectric effect supports the particulate nature of electromagnetic radiation, and how phenomena such as interference and diffraction support its wave nature. Answer:
- Qualitative Evidence: Describe the evidence provided by electron diffraction that supports the wave nature of particles. Answer:
- Understanding de Broglie Wavelength: Define the de Broglie wavelength and its significance in quantum physics. Answer:
- Formula Application: Use the formula to calculate the de Broglie wavelength of an electron moving with a momentum of kg m/s.
Answer:
Energy Levels in Atoms and Line Spectra
- Understanding Discrete Energy Levels: Explain why isolated atoms, such as atomic hydrogen, have discrete electron energy levels. Answer:
- Emission and Absorption Line Spectra: Describe the appearance and formation of emission and absorption line spectra. Answer:
- Formula Recall and Use: Apply the formula to calculate the frequency of light emitted when an electron transitions between two energy levels. Answer:
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