Quantum and Atomic Physics

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The Cathode Ray Tube experiment is associated with
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J.J. Thomson
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The electron charge was measured the first time in
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Oil drop experiment
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What is the difference between cathode rays and X-rays
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Cathode rays are particles and x-rays are electromagnetic radiation
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What distinctive phenomena are illustrated in X-ray spectra
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Bremsstrahlung, internal atomic structure of the anode
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Which of the following colors indicates an object of the lowest temperature
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Red
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Which is a property of a black body radiator
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It absorbs all incident radiation, then re-emits it at frequencies determined by its temperature
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Which of the following photons has the greatest energy
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γ-photon
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What discrepancy between experiment and theory helped lead Max Planck to his quantum theory
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The Ultraviolet catastrophe
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The energy of a photon depends on
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temperature
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How does the energy of a photon change if the wavelength is doubled
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Energy is halved
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How dos the momentum of a photon change if the wavelength is halved
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doubles
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The photoelectric effect explains
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The particle nature of light
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The kinetic energy of photo-electrons depends on
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work function, wavelength of light
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which of the following is the formula of the photon momentum
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p=hf/c
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the stopping potential of photo-electrons depends on which of the following
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the frequency of the photons, the composition of the metal surface
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which of the following formulas expresses the photoelectric effect
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hf=W₀+KE
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all of the following are properties of γ-rays except
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they ionize gases
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which of the following phenomena provides the best evidence that light can have particle properties
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compton scattering
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which of the following phenomena provides the best evidence that particles can have wave properties
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the interference pattern produced by neutrons incident on a crystal
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which of the following formulas can be used to determine de broglie wavelength
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λ=h/mv
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a photon can disappear producing an electron and positron. what is the phenomenon called
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pair production
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when a proton collides with an antiproton they disappear producing photons. this phenomenon is called
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annihilation
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electrons are accelerated to a maximum speed of v in an x-ray tube by an applied voltage V₀. what is the maximum speed of the electrons if the voltage is quadrupled.
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2v
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in compton effect experiment a photon scattered from an electron at rest increases its wavelength. which of the following deflection angles provides the greatest increase in the wavelength of the scattered photon
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180
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if all of the following objects move at the same speed which one will have the greatest debroglie wavelength
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electron
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rutherfords scattering α-particles by a gold foil experiment disproved which of the following
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plum-pudding model of the atom
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in rutherfords experiment most of α-particls pass through the foil without deflection. which of the following properties of the atom can be explained by this observation
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an atoms positive charge is concentrated in the nucleus, an atom is mostly empty space
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which of the following statements can be associated with boars theory of the atom
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an electron can change its energy only by a certain portion when it jumps between the orbits, the angular momentum of an electron around the nucleus is equal an integer time h/2pi
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when an electron falls from an orbit the first excited state to the ground state
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a photon is emitted
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in the bohr model when an electron jumps from the n=1 orbit to the n=3 orbit what is its new orbital radius as a proportion of r1
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9r1
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in the bohr model when an electron jumps from the n=1 orbit to the n=4 orbit what is its new energy as a proportion of E1
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E1/16
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in the bohr model, when an electron orbits a single proton in the n=5 state, how many debroglie wavelengths fit onto the circumference of this orbit
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5
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an electron accelerated from rest by a 600V potential difference has a debrolgie wavelength of λ. what would the electrons de broglie wavelength be if the potential difference had been 150 V
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according to maxwells theory of electromagnetism, an electron orbiting a nucleus must
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radiate its energy
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according to the bohrs theory of the hydrogen atom, electrons starting in the 4th energy level and eventually ending in the ground state could produce a total of how many different spectral lines
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6

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