The single particle density of states
... sound waves are also quantized and the name given to a single quantum is the “phonon”. The dispersion relation at long wavelengths is ǫ = h̄ω = h̄vk , ...
... sound waves are also quantized and the name given to a single quantum is the “phonon”. The dispersion relation at long wavelengths is ǫ = h̄ω = h̄vk , ...
IB HL Physics More Problems on Quantum and Nuclear Physics_
... 4. A proton and an alpha particle have the same de Broglie wavelength. Which of the following is approximately the ratio ...
... 4. A proton and an alpha particle have the same de Broglie wavelength. Which of the following is approximately the ratio ...
"Ultrafast experiments" (Presentation)
... ps region, thus an all-optical technique is needed for measurement ...
... ps region, thus an all-optical technique is needed for measurement ...
Astronomy 748 Homework 1: Special Relativity Due Monday, September 28
... You are familiar with the derivation of the Doppler shift using Galilean transformations. Here you will use Lorentz transforms. a) Consider a source at rest with respect to the observer, i.e. with four-velocity uα = (1, ~0). Now consider a moving source, i.e. one in a Lorentz boosted frame. What is ...
... You are familiar with the derivation of the Doppler shift using Galilean transformations. Here you will use Lorentz transforms. a) Consider a source at rest with respect to the observer, i.e. with four-velocity uα = (1, ~0). Now consider a moving source, i.e. one in a Lorentz boosted frame. What is ...
Introduction to the principles of Atomic Spectroscopy
... XRF instrument measures the photon energy from the fluorescence to identify the element and the intensity of the photon to measure the amount of element in the sample ...
... XRF instrument measures the photon energy from the fluorescence to identify the element and the intensity of the photon to measure the amount of element in the sample ...
Practice Quiz
... Previous material – H atom, laser, blackbody radiation New material – QM wavefunction Physics 274 ...
... Previous material – H atom, laser, blackbody radiation New material – QM wavefunction Physics 274 ...
Quantum Theory of the Atom
... • Electromagnetic spectrum is the range of all energies emitted from photons acting like waves. • If it is not in the visible light range, it may be giving off other forms of electromagnetic radiation like radio, microwaves, infrared, ultra violet, x-rays, or gamma rays. • Used to determine which el ...
... • Electromagnetic spectrum is the range of all energies emitted from photons acting like waves. • If it is not in the visible light range, it may be giving off other forms of electromagnetic radiation like radio, microwaves, infrared, ultra violet, x-rays, or gamma rays. • Used to determine which el ...
Easy explanation
... atoms shift from red (low-energy) to orange to yellow to green to blue (high-energy) relatively quickly. (and also, we would expect not to exist as the electrical potential in atoms would have evened out long ago, making life as we know it impossible.) ...
... atoms shift from red (low-energy) to orange to yellow to green to blue (high-energy) relatively quickly. (and also, we would expect not to exist as the electrical potential in atoms would have evened out long ago, making life as we know it impossible.) ...
slicing and dicing photons - Department of Physics and Astronomy
... excitation energy, EEr3+ ≈ 0.81 eV, and is therefore lower. In semiconductors, photogenerated charge carriers with excess energy above the band edge relax on the subpicosecond ...
... excitation energy, EEr3+ ≈ 0.81 eV, and is therefore lower. In semiconductors, photogenerated charge carriers with excess energy above the band edge relax on the subpicosecond ...
Phys202_Exam3_2006.doc
... 23. What problem did Compton address? a. cavity radiation b. photoelectric effect c. vacuum polarization d. ~ scattering of light by photons 24. What did he confirm? a.~ light is made of particles – the photon b. Maxwells equations are correct c. the velocity of light is a constant d. there is no ne ...
... 23. What problem did Compton address? a. cavity radiation b. photoelectric effect c. vacuum polarization d. ~ scattering of light by photons 24. What did he confirm? a.~ light is made of particles – the photon b. Maxwells equations are correct c. the velocity of light is a constant d. there is no ne ...
Hooman Mohseni - Center for Detectors
... additional degrees of freedom offered by a three-dimensional geometry, and utilized a detection and amplification method that is inspired by single-photon detection mechanism of the rod cells in the eye. In this talk, I present a review of the results we have achieved with our bio-inspired “Nano-inj ...
... additional degrees of freedom offered by a three-dimensional geometry, and utilized a detection and amplification method that is inspired by single-photon detection mechanism of the rod cells in the eye. In this talk, I present a review of the results we have achieved with our bio-inspired “Nano-inj ...
This `practice exam`
... 37. Which of the following ions have the same ground state electron configuration: Sn4+, Pb4+, Sr2+, and Br-? Sr2+ and Br38. Which one of the following statements is INCORRECT? a) Ionization energy is always a positive value. b) Ionization energy is the energy required to remove an electron from a g ...
... 37. Which of the following ions have the same ground state electron configuration: Sn4+, Pb4+, Sr2+, and Br-? Sr2+ and Br38. Which one of the following statements is INCORRECT? a) Ionization energy is always a positive value. b) Ionization energy is the energy required to remove an electron from a g ...
X-ray Source
... Camera film is “taped” around the inner circle of the sampling chamber with sample being placed at the center. ...
... Camera film is “taped” around the inner circle of the sampling chamber with sample being placed at the center. ...
Chapter 6 Outline full
... Rutherford assumed the electrons orbited the nucleus analogous to planets around the sun. • However, a charged particle moving in a circular path should lose energy. • This means that the atom should be unstable according to Rutherford’s theory. ...
... Rutherford assumed the electrons orbited the nucleus analogous to planets around the sun. • However, a charged particle moving in a circular path should lose energy. • This means that the atom should be unstable according to Rutherford’s theory. ...
Instrumental Methods of Analysis
... temperature by passing current through it; positive temperature coefficient.. • Both of these sources suffer from having low intensities ( 107 109 W) and has led authors to claim that source is energy limited. ...
... temperature by passing current through it; positive temperature coefficient.. • Both of these sources suffer from having low intensities ( 107 109 W) and has led authors to claim that source is energy limited. ...
CH4 PT1 Arrangement of Electrons
... • If an electron absorbs energy, it can go to a higher level. • If in a higher energy level, an electron can emit a certain amount of energy to move to a lower level. ...
... • If an electron absorbs energy, it can go to a higher level. • If in a higher energy level, an electron can emit a certain amount of energy to move to a lower level. ...
Chemistry 1000 Lecture 6: Quantum mechanics and spectroscopy
... also applies to particles for which p = mv Prediction: particles (electrons, neutrons, etc.) should diffract like light under appropriate conditions Modern methods based on this fact: transmission electron microscopy, neutron diffraction ...
... also applies to particles for which p = mv Prediction: particles (electrons, neutrons, etc.) should diffract like light under appropriate conditions Modern methods based on this fact: transmission electron microscopy, neutron diffraction ...
Spectroscopic methods for biology and medicine
... If more diffraction centers are present, the interference grows more complex. If the interfering centers are regularly spaced, however, then the pattern becomes much sharper because only the absolute interference maxima remain. The latter is the case in crystals and is the reason why X-ray diffracti ...
... If more diffraction centers are present, the interference grows more complex. If the interfering centers are regularly spaced, however, then the pattern becomes much sharper because only the absolute interference maxima remain. The latter is the case in crystals and is the reason why X-ray diffracti ...
Quantum eraser
... a unitary fashion. The state vector we got is effectively the same as in the two level atoms case, meaning we have erased the record of which atom did the γ photon scattering and reinstated our interference pattern. ...
... a unitary fashion. The state vector we got is effectively the same as in the two level atoms case, meaning we have erased the record of which atom did the γ photon scattering and reinstated our interference pattern. ...
Word Format
... Many lines were not seen. This indicated that there were selection rules that determined what lines were present. ...
... Many lines were not seen. This indicated that there were selection rules that determined what lines were present. ...
Manne Siegbahn - Nobel Lecture
... to a whole range of major problems which the use of X-rays has made it possible to solve. It is obvious that the fact that X-rays are such an important tool for workers in various fields of science forms a very cogent reason for undertaking a thorough investigation of their nature. It is also clear ...
... to a whole range of major problems which the use of X-rays has made it possible to solve. It is obvious that the fact that X-rays are such an important tool for workers in various fields of science forms a very cogent reason for undertaking a thorough investigation of their nature. It is also clear ...
Where are the electrons
... Electrons must jump from level to level, they can not reside between the levels ...
... Electrons must jump from level to level, they can not reside between the levels ...
Quantum Physics
... metastable state – state where stimulated emission lifetime is longer than spontaneous emission lifetime, state where stimulated emission is more likely than spontaneous emission population inversion – when there are more atoms in state 2 than in state 1, a necessary condition for continued lasing s ...
... metastable state – state where stimulated emission lifetime is longer than spontaneous emission lifetime, state where stimulated emission is more likely than spontaneous emission population inversion – when there are more atoms in state 2 than in state 1, a necessary condition for continued lasing s ...
AtomLightEmissQuantum
... What would you expect to see if you viewed the glowing filament through a diffraction grating? When viewed in this way, all of the colors of the rainbow would be visible. The bulb also emits infrared radiation that you would not see. A plot of the intensity of the light emitted from a hot body over ...
... What would you expect to see if you viewed the glowing filament through a diffraction grating? When viewed in this way, all of the colors of the rainbow would be visible. The bulb also emits infrared radiation that you would not see. A plot of the intensity of the light emitted from a hot body over ...
X-ray fluorescence
X-ray fluorescence (XRF) is the emission of characteristic ""secondary"" (or fluorescent) X-rays from a material that has been excited by bombarding with high-energy X-rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis, particularly in the investigation of metals, glass, ceramics and building materials, and for research in geochemistry, forensic science and archaeology.