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Modern Physics > Exponential Evidence for Quantum Mechanics Pt. 2 > Flashcards

Exponential Evidence for Quantum Mechanics Pt. 2 Flashcards

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1
Q

Visible. Photons with wavelengths in the roughly 400-700 nm range

A

VIS

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2
Q

A nuclear medicine imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease.

A

PET-Scan

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3
Q

Ultraviolet. Photons with wavelengths in the roughly 0.01-700nm range

A

UV

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4
Q

Infrared. Photons with wavelengths in the roughly 700 nm-1mm range

A

IR

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5
Q

The creation of a subatomic particle and its antiparticle from an incident photon

A

Pair Production

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6
Q

The speed of the electron in the lowest Bohr orbit, expressed as a fraction of the speed of light

A

1/137

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7
Q

In pair production , the photon must have higher energy than the sum of the rest mass energies of an electron and positron

A

1.022 MeV

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8
Q

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 __.

A

15-inch

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9
Q

In Compton scattering from stationary electrons, the largest change in wavelength occurs when the photon is scattered through __.

A

180 degrees

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10
Q

The group of hydrogen VISible spectral lines where the final quantum number is n=2

A

Balmer Series

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11
Q

The electron is able to revolve in certain stable orbits around the nucleus without radiating any energy, contrary to what classical electromagentism suggests.

A

Bohr-Postulate-1

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12
Q

The stationary orbits are attained at distances for which the angular momentum of the revolving electron is an integral multiple of Planck’s constant

A

Bohr-Postulate-2A

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13
Q

In theses orbits, the electron’s acceleratoin does not result in radiation and energy loss.

A

Bohr-Postulate-2B

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14
Q

Electrons can only gain and lose energy by jumping from one allowed orbit to another…

A

Bohr-Postulate-3

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15
Q

0.529 Angstrom = 0.0529 nm

A

Bohr-Radius

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16
Q

A refinement of hydrogen UV spectral lines where the line final quantum number is n=1

A

Bohr-Sommerfeld-Model

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17
Q

Arthur __. Demonstrated the particle nature of EM radiation.

A

Compton

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18
Q

The scattering of a photon by a charged particle, usually an electron.

A

Compton scattering

19
Q

Compton wavelength

A

.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)

20
Q

Occrs when an electron and a positron collide

A

Electron-Positron-Annihilation

21
Q

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 __.

A

Energy

22
Q

The allowed electron orbits are associated with definite energies and area also called energy shells or __.

A

Energy levels

23
Q

One __ of the Bohr model is that the quantum number is not actuyally associated with the angular momentum of the electrons…

A

Failure

24
Q

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.

A

Fine-Structure-Constant

25
Q

Becayse of it’s halflife of 109 min, this positron-emitting radioisotope is often made on-site in hospitals using a cyclotron

A

Fluorine-18

26
Q

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

A

Geiger

27
Q

Photons with wavelengths in the roughly 700 nm~1mm range

A

Infrared

28
Q

As a result of Compton scattering, the scattered photon has a __ wavelength than the incident photon.

A

Longer

29
Q

As a result of Compton scattering, the scatted photon has a __ energy than the incident photon.

A

Lower

30
Q

The groupof hydrogen UV spectral lines where the final quantum number is n=1

A

Lyman-series

31
Q

The undergraduate student who helped discover the atomic nucleus

A

Marsden

32
Q

Robert __ and Harvey Fletcher are credited with the first direct measurement of the charge on the electron in the years 1908-1909

A

Millikan

33
Q

The creation of a subatomic particle and its antiparticle from an incident photon.

A

Pair-production

34
Q

The group of hydrogen IR spectral lines where the final quantum number is n=3

A

Paschen-series

35
Q

A nuclear medicine imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease

A

PET scan

36
Q

The quantum of the EM field including EM radiation such as light and radio waves

A

Photon

37
Q

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

A

Plum-pudding model

38
Q

The antiparticle of the antimatter counterpart of the electron

A

Positron

39
Q

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

A

Rutherford-Gold-Foil

40
Q

A spectacular success of the 1914 Bohr model ws in reproducing the __, a formula first guessed by school teacher Jakob Balmer in 1887

A

Rydberg-formula

41
Q

The Compton effect was observed for x-rays rather thanVIS photons because X-rays have __ wavelengths, on the order of the Compton wavelength.

A

Shorter

42
Q

The classical description of elastic scattering of EM waves by a free charged particle, as described by classical electromagnetism

A

Thomson-scattering

43
Q

Photons with wavelengths in the roughly 0.01 to 700nm range

A

Ultraviolet

44
Q

Photons with the wavelengths in the roughly 400-700nm range

A

Visible

Modern Physics (6 decks)

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