Exponential Evidence for Quantum Mechanics Pt. 2 Flashcards
Visible. Photons with wavelengths in the roughly 400-700 nm range
VIS
A nuclear medicine imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease.
PET-Scan
Ultraviolet. Photons with wavelengths in the roughly 0.01-700nm range
UV
Infrared. Photons with wavelengths in the roughly 700 nm-1mm range
IR
The creation of a subatomic particle and its antiparticle from an incident photon
Pair Production
The speed of the electron in the lowest Bohr orbit, expressed as a fraction of the speed of light
1/137
In pair production , the photon must have higher energy than the sum of the rest mass energies of an electron and positron
1.022 MeV
In the Compton effect, if a photon is scatter at a particular angle, the resulting wavelength shift for the scattered photon is independent of the incident __.
15-inch
In Compton scattering from stationary electrons, the largest change in wavelength occurs when the photon is scattered through __.
180 degrees
The group of hydrogen VISible spectral lines where the final quantum number is n=2
Balmer Series
The electron is able to revolve in certain stable orbits around the nucleus without radiating any energy, contrary to what classical electromagentism suggests.
Bohr-Postulate-1
The stationary orbits are attained at distances for which the angular momentum of the revolving electron is an integral multiple of Planck’s constant
Bohr-Postulate-2A
In theses orbits, the electron’s acceleratoin does not result in radiation and energy loss.
Bohr-Postulate-2B
Electrons can only gain and lose energy by jumping from one allowed orbit to another…
Bohr-Postulate-3
0.529 Angstrom = 0.0529 nm
Bohr-Radius
A refinement of hydrogen UV spectral lines where the line final quantum number is n=1
Bohr-Sommerfeld-Model
Arthur __. Demonstrated the particle nature of EM radiation.
Compton
The scattering of a photon by a charged particle, usually an electron.
Compton scattering
Compton wavelength
.002426 nm. The name fiven to the quantity “h/mc” because it appearts in the Compton formula for wavelength shift and has units of meters (nm)
Occrs when an electron and a positron collide
Electron-Positron-Annihilation
In the Compton effect, if a photon is scattererd at a particular angle, the resulting wavelength shiftfor the scattered photon is independent of the incident __.
Energy
The allowed electron orbits are associated with definite energies and area also called energy shells or __.
Energy levels
One __ of the Bohr model is that the quantum number is not actuyally associated with the angular momentum of the electrons…
Failure
The numerical quanity 1/137 became known as the __, which was useful in describing the separation between some spectral lines of hydrogen as mesaured by Michelson and Morley.
Fine-Structure-Constant
Becayse of it’s halflife of 109 min, this positron-emitting radioisotope is often made on-site in hospitals using a cyclotron
Fluorine-18
Best known as the co-inventor of the detector component of the Geiger counter and for the Geiger-Masrden experiment which discovered the atomic nucleus
Geiger
Photons with wavelengths in the roughly 700 nm~1mm range
Infrared
As a result of Compton scattering, the scattered photon has a __ wavelength than the incident photon.
Longer
As a result of Compton scattering, the scatted photon has a __ energy than the incident photon.
Lower
The groupof hydrogen UV spectral lines where the final quantum number is n=1
Lyman-series
The undergraduate student who helped discover the atomic nucleus
Marsden
Robert __ and Harvey Fletcher are credited with the first direct measurement of the charge on the electron in the years 1908-1909
Millikan
The creation of a subatomic particle and its antiparticle from an incident photon.
Pair-production
The group of hydrogen IR spectral lines where the final quantum number is n=3
Paschen-series
A nuclear medicine imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease
PET scan
The quantum of the EM field including EM radiation such as light and radio waves
Photon
This model tried to explain two properties of atoms then known; that electrons are negatively-charged particles and that atoms have no net electric charge
Plum-pudding model
The antiparticle of the antimatter counterpart of the electron
Positron
Series of experiments by which scientists discovered that every atom contains a nucleus where all of its positive charge and most of its mass are concentrated
Rutherford-Gold-Foil
A spectacular success of the 1914 Bohr model ws in reproducing the __, a formula first guessed by school teacher Jakob Balmer in 1887
Rydberg-formula
The Compton effect was observed for x-rays rather thanVIS photons because X-rays have __ wavelengths, on the order of the Compton wavelength.
Shorter
The classical description of elastic scattering of EM waves by a free charged particle, as described by classical electromagnetism
Thomson-scattering
Photons with wavelengths in the roughly 0.01 to 700nm range
Ultraviolet
Photons with the wavelengths in the roughly 400-700nm range
Visible
