Scattering - Quiz
Scattering
  • 1. What mathematical structure pairs solutions from the distant past to the distant future in scattering theory?
A) The scattering matrix
B) The spectral vector
C) The differential manifold
D) The Hilbert operator
  • 2. In quantum mechanics, what does a discrete spectrum correspond to?
A) Bound states
B) Inelastic transitions
C) Wave functions
D) Scattering states
  • 3. Which of the following is considered an inelastic scattering process?
A) Mie scattering
B) Raman scattering
C) Rayleigh scattering
D) Elastic light scattering
  • 4. What is the primary cause of the blue color of the Earth's sky?
A) Mie scattering
B) Spectral absorption
C) Rayleigh scattering
D) Geometric scattering
  • 5. For which shapes is Mie theory generally applicable?
A) Arbitrary complex shapes
B) Spheres
C) Fractal dust particles
D) Liquid density fluctuations
  • 6. Which equation is used in regular quantum mechanics for scattering problems?
A) Schrödinger equation
B) Maxwell's equations
C) Geometric optics
D) Wave equation
  • 7. What is the primary physical process, besides absorption, that contributes to the visible appearance of objects?
A) Quantum tunneling
B) Spectral emission
C) Light scattering
D) Particle decay
  • 8. What does a glossy appearance indicate about surface scattering?
A) Multiple internal scattering
B) High level of surface scattering
C) Absence of surface scattering
D) Strong Rayleigh scattering
  • 9. In the Rayleigh scattering regime, what is the relationship between wavelength and scattering intensity?
A) λ4
B) 1/λ4
C) 1/λ
D) 1/λ2
  • 10. Which technique is used to solve scattering problems in quantum mechanics alongside partial wave analysis?
A) Inverse scattering transform
B) Born approximation
C) Finite-element method
D) Rayleigh-Gans approximation
  • 11. What does an alpha value much larger than 1 represent in light scattering?
A) Resonant scattering
B) Rayleigh scattering
C) Geometric scattering
D) Mie scattering
  • 12. What is the result of applying an electric field to particles in a liquid during electrophoresis?
A) Creation of new particles
B) Total light absorption
C) Migration of macromolecules
D) Immediate decay of particles
  • 13. What happens to the energy in elastic scattering processes?
A) It increases significantly
B) It is not substantially changed
C) It decreases significantly
D) It is completely converted to heat
  • 14. Which numerical method is common for modeling scattering by large, irregularly shaped particles?
A) Rayleigh's model
B) Mie theory
C) Geometric optics approximation
D) Finite-element methods
  • 15. Which theory is often used to model multiple scattering?
A) Statistical mechanics
B) General relativity
C) Diffusion theory
D) Quantum field theory
  • 16. What is an example of single scattering provided in the text?
A) An electron fired at an atomic nucleus
B) Coherent backscattering
C) A laser beam in radar scattering
D) A light beam passing through thick fog
  • 17. What are optical elements designed to produce multiple scattering called?
A) Diffusers
B) Reflectors
C) Focusers
D) Scatters
  • 18. What is coherent backscattering usually attributed to?
A) Weak localization
B) Particle duality
C) Diffusion theory
D) Speckles
  • 19. Can single scattering ever be deterministic?
A) Only in radar systems
B) No, it is always random
C) Only in fog
D) Yes, with a well-controlled laser beam
  • 20. What is an example of a macroscopic object involved in radar scattering?
A) A microscopic particle
B) An atomic nucleus
C) An aircraft
D) An electron
  • 21. What are the random fluctuations in the multiply scattered intensity of coherent radiation called?
A) Diffusers
B) Speckles
C) Backscattering
D) Waves
  • 22. What is the distinction between single and multiple scattering related to?
A) Thermodynamics
B) Wave–particle duality
C) Chemical composition
D) Gravity
  • 23. What is the term for reflections that do not follow the law of reflection due to scattering?
A) Refracted reflections
B) Diffuse reflections
C) Mirror-like reflections
D) Specular reflections
  • 24. Who was one of the first people to discuss light scattering in the 17th century?
A) Werner Heisenberg
B) John Archibald Wheeler
C) Isaac Newton
D) Ernest Rutherford
  • 25. Which two scientists introduced and developed the S-Matrix?
A) William Herschel and John Tyndall
B) John Archibald Wheeler and Werner Heisenberg
C) John Tyndall and Ernest Rutherford
D) Isaac Newton and William Herschel
  • 26. Which of these is considered a 'scattering center' or 'scatterer'?
A) Perfectly smooth surfaces
B) Uniform gravitational fields
C) Empty space
D) Density fluctuations in fluids
  • 27. In which field is particle-particle scattering theory particularly important?
A) Biology
B) Nuclear physics
C) Geology
D) Economics
  • 28. How are unscattered reflections commonly described?
A) Non-linear
B) Non-uniform
C) Specular
D) Diffuse
  • 29. What did William Herschel refer to the scattering of in 1800?
A) Cathode rays
B) X-rays
C) Sound waves
D) Heat rays
  • 30. What discovery by Ernest Rutherford in 1911 contributed to the broader sense of scattering?
A) The law of reflection
B) Subatomic particles
C) The quantum S-Matrix
D) The diffraction of light
  • 31. Which of the following is a concept used to quantify scattering?
A) Potential energy
B) Total mass
C) Surface tension
D) Mean free path
  • 32. Where does cosmic ray scattering occur?
A) In fluorescent lamps.
B) Inside particle accelerators.
C) In nuclear reactors.
D) In the Earth's upper atmosphere.
  • 33. Which of the following is an application of scattering theory?
A) Hydraulic pressure measurement
B) Battery charging
C) Medical ultrasound
D) Steam engine design
  • 34. Which example is given for wave scattering in the text?
A) Sunlight scattered by rain drops
B) The evaporation of water
C) The combustion of fuel
D) The growth of crystals
  • 35. What is the primary focus of the direct scattering problem?
A) Ignoring the scattering process entirely
B) Removing the scatterer from the environment
C) Determining the scatterer from measurement data
D) Determining scattered flux based on scatterer characteristics
  • 36. In the equation dI/dx = -QI, what does Q represent?
A) Initial flux
B) Path length
C) Interaction coefficient
D) Mass density
  • 37. What is the unit of area cross-section σ mentioned in nuclear physics?
A) Celsius
B) Grams per cm2
C) Nanometers
D) Barns
  • 38. What is the term for Q in electromagnetic absorption spectroscopy?
A) Thermal conductivity
B) Nuclear cross-section
C) Opacity
D) Diffraction constant
  • 39. What potential is associated with the hydrogen atom in the Schrödinger equation?
A) Positive linear potential.
B) Infinite potential well.
C) Zero potential.
D) Negative inverse-power central potential.
  • 40. What can happen to hydrogen atoms when they scatter off one another?
A) They fuse into a helium atom.
B) They always remain in the ground state.
C) They repel each other without any interaction.
D) They can become ionized.
  • 41. In inelastic scattering, what might happen to the electrons of a scattering atom?
A) They remain in the ground state.
B) They may become excited.
C) They are removed from existence permanently.
D) They convert into protons.
  • 42. What type of Coulombic potential is mentioned regarding the hydrogen atom?
A) Oscillatory.
B) Neutral.
C) Repulsive.
D) Attractive.
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