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Atomic, molecular, and optical physics - Exam
Atomic molecular and optical physics
  • 1. Atomic, molecular, and optical physics is the branch of physics that studies and explores the behavior of atoms, molecules, and light. This field delves into the fundamental principles governing the interactions and dynamics of particles at the atomic and molecular scales. Researchers in this field investigate a wide range of phenomena, including atomic and molecular structure, spectroscopy, chemical reactions, and the interactions of atoms and molecules with electromagnetic radiation. By studying these processes, scientists gain insights into the fundamental nature of matter and light, leading to advancements in areas such as quantum mechanics, quantum optics, and laser technology. Overall, the study of atomic, molecular, and optical physics plays a crucial role in understanding the physical world at its most fundamental level.

    Which physicist introduced the concept of the wave-particle duality of light?
A) Niels Bohr.
B) Albert Einstein.
C) Max Planck.
D) Louis de Broglie.
  • 2. What is the unit of energy used in atomic and molecular physics?
A) Electronvolt (eV).
B) Watt (W).
C) Joule (J).
D) Hertz (Hz).
  • 3. What is the process that describes the emission of light by electrons moving between energy levels?
A) Stimulated emission.
B) Spontaneous emission.
C) Resonance.
D) Absorption.
  • 4. What does the term 'Rydberg atom' refer to?
A) An atom with equal numbers of protons and electrons.
B) An atom with one highly excited electron.
C) An atom exposed to high-intensity laser light.
D) An atom held in a magnetic trap.
  • 5. In a molecule, what is a bond formed by the sharing of electron pairs called?
A) Ionic bond.
B) Hydrogen bond.
C) Van der Waals bond.
D) Covalent bond.
  • 6. What is the term used to describe the bending of light as it passes from one medium to another?
A) Reflection.
B) Refraction.
C) Diffusion.
D) Dispersion.
  • 7. What is the term for the process by which a gas or vapor turns into a liquid?
A) Condensation.
B) Evaporation.
C) Sublimation.
D) Crystallization.
  • 8. What is the process of light being bent around an object called?
A) Refraction.
B) Absorption.
C) Reflection.
D) Diffraction.
  • 9. In atomic spectroscopy, what is the term for the shift in the position of spectral lines due to an external magnetic field?
A) Doppler effect.
B) Zeeman effect.
C) Paschen-Back effect.
D) Stark effect.
  • 10. What is the number of protons in the nucleus of an atom called?
A) Atomic number
B) Mass number
C) Charge number
D) Neutron number
  • 11. What is the study of interactions between light and matter called?
A) Optics
B) Quantum mechanics
C) Thermodynamics
D) Astrophysics
  • 12. What is the unit of measurement for the amount of light absorption by a material?
A) Opacity.
B) Reflectance.
C) Absorbance.
D) Transmittance.
  • 13. Which type of electromagnetic radiation has the highest energy in the electromagnetic spectrum?
A) Microwaves
B) Gamma rays
C) Visible light
D) Radio waves
  • 14. What is the primary unit of measurement used to express the size of atoms and molecules?
A) Millimeter
B) Angstrom (Å)
C) Nanometer
D) Centimeter
  • 15. What is the total number of electrons in a neutral atom of oxygen?
A) 12
B) 6
C) 8
D) 10
  • 16. Which scientist is credited with the discovery of the electron?
A) James Clerk Maxwell
B) J.J. Thomson
C) Niels Bohr
D) Erwin Schrödinger
  • 17. Which subfield of physics studies the behavior of atoms and molecules?
A) Nuclear physics
B) Quantum mechanics
C) Atomic physics
D) Particle physics
  • 18. What is the term for the process of light scattering in all directions when passing through a medium?
A) Raman scattering.
B) Rayleigh scattering.
C) Mie scattering.
D) Compton scattering.
  • 19. Which basic force is responsible for holding the nucleus of an atom together?
A) Gravitational force
B) Weak nuclear force
C) Strong nuclear force
D) Electromagnetic force
  • 20. What is the process of an atom losing an electron called?
A) Fusion
B) Decay
C) Excitation
D) Ionization
  • 21. In the Bohr model of the atom, which orbits do electrons occupy?
A) Elliptical orbits
B) Random orbits
C) Quantized orbits
D) Circular orbits
  • 22. What is the nucleus of an atom made up of?
A) Neutrons and electrons
B) Protons and neutrons
C) Electrons and positrons
D) Protons and electrons
  • 23. What is the process by which an atom absorbs a photon of light and moves to a higher energy level called?
A) Fusion
B) Decay
C) Ionization
D) Excitation
  • 24. In molecular physics, what additional degrees of freedom create more complicated Hamiltonians?
A) Photon interactions
B) Molecular structure
C) Electron spin states
D) Atomic nuclei alone
  • 25. Where are pure rotational spectra typically found in the electromagnetic spectrum?
A) Gamma ray region
B) Visible light region
C) X-ray region
D) Far infrared region (about 30 - 150 μm wavelength)
  • 26. What can be calculated from measuring rotational and vibrational spectra properties of molecules?
A) The gravitational constant
B) The distance between the nuclei
C) The speed of light
D) The mass of electrons
  • 27. What is quantum chemistry primarily concerned with?
A) Developing new materials for industrial applications
B) Studying the behavior of black holes
C) Exploring the properties of dark matter
D) Understanding the dynamics of systems, particularly for molecules
  • 28. Who demonstrated electromagnetically induced transparency?
A) Lene Vestergaard Hau.
B) Nikola Tesla.
C) S. E. Harris.
D) Albert Einstein.
  • 29. Which technique is used for nano-optical measurements in optical physics?
A) X-ray crystallography.
B) Traditional microscopy.
C) Novel optical techniques.
D) Electron microscopy.
  • 30. What does optical coherence tomography focus on?
A) High-resolution imaging of biological tissues.
B) Nuclear magnetic resonance.
C) Quantum state measurement.
D) Low-coherence interferometry.
  • 31. Who developed the theory that matter was composed of atoms in the 18th century?
A) Joseph von Fraunhofer
B) Max Planck
C) John Dalton
D) Dmitri Mendeleyev
  • 32. Which physicist discovered spectral lines that connected atomic physics with optical physics?
A) John Dalton
B) Max Planck
C) Hendrik Lorentz
D) Joseph von Fraunhofer
  • 33. What model did Niels Bohr combine with Rutherford's atomic model?
A) Einstein's photoelectric effect theory
B) Lorentz oscillator model
C) Fraunhofer's spectral line discovery
D) Planck's quantisation ideas
  • 34. What did the Bohr atom model attempt to explain?
A) Alpha particle scattering
B) The photoelectric effect
C) Hydrogen spectral lines
D) Electromagnetic radiation inside a box
  • 35. Who derived the formula for electromagnetic fields in thermal equilibrium within a box?
A) Albert Einstein
B) Max Planck
C) Niels Bohr
D) Ernest Rutherford
  • 36. What was the limitation of the Bohr model?
A) It could only explain hydrogen
B) It predicted the photoelectric effect
C) It explained blackbody radiation
D) It described alpha particle scattering
  • 37. Who formulated matrix mechanics, a key development in quantum mechanics?
A) Werner Heisenberg
B) Niels Bohr
C) Albert Einstein
D) Erwin Schrödinger
  • 38. Who discovered the Schrödinger equation?
A) Werner Heisenberg
B) Louis de Broglie
C) Erwin Schrödinger
D) Max Planck
  • 39. In semi-classical treatments within AMO, which aspect is typically treated classically?
A) Relative motion of quantum systems at medium to high speeds
B) Internal degrees of freedom in collision dynamics
C) The electromagnetic field in laser interactions
D) Electron dynamics using Monte-Carlo methods
  • 40. In collision dynamics, how are the internal degrees of freedom treated in a semi-classical approach?
A) Neglected entirely
B) Classically
C) Using classical Monte-Carlo methods
D) Quantum mechanically
  • 41. At what speeds does the approximation of treating nuclei classically and electrons quantum mechanically fail?
A) Low speed collisions
B) All collision speeds
C) High speed collisions
D) Medium speed collisions
  • 42. What is a characteristic treatment in classical Monte-Carlo methods for electron dynamics?
A) Only the final state is treated classically
B) Initial conditions are quantum mechanically calculated, but further treatment is classical
C) Both initial and subsequent treatments are fully quantum mechanical
D) All treatments are classical
  • 43. What is the term used to describe the energy necessary to remove an electron from its shell?
A) Binding energy
B) Kinetic energy
C) Ionization potential
D) Excitation energy
  • 44. What is the term for electrons that populate a shell around the nucleus?
A) Free state
B) Excited state
C) Virtual state
D) Bound state
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