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General relativity - Quiz
General relativity
  • 1. What is the result of combining Newtonian gravity's geometric description with special relativity?
A) A heuristic derivation of general relativity
B) A unified theory of electromagnetism
C) A disproof of Newton's second law
D) The total abandonment of Euclidean geometry
  • 2. According to Newton's second law, what is the net force equal to?
A) Position squared
B) Gravitational constant divided by distance
C) Velocity multiplied by time
D) Inertial mass multiplied by acceleration
  • 3. In classical mechanics, what are the paths of objects in free motion called?
A) Geodesics
B) Parabolic curves
C) Random paths
D) Hyperbolic trajectories
  • 4. What is another name for the universality of free fall?
A) The Newton-Cartan theory
B) The weak equivalence principle
C) The strong gravitation principle
D) The inertial law of motion
  • 5. The Eötvös experiment verified the universal equality of what two properties?
A) Force and energy
B) Velocity and acceleration
C) Inertial and passive-gravitational mass
D) Space and time
  • 6. What does Einstein's elevator experiment demonstrate?
A) The curvature of Euclidean space
B) The variation of mass in a vacuum
C) The indistinguishability between gravity and acceleration
D) The existence of a stationary frame
  • 7. What implies that there is no observable distinction between inertial motion and motion under gravity?
A) The integration of Newtonian connections
B) The universality of free fall
C) The friction of external forces
D) The rigidity of Euclidean space
  • 8. In the geometric construction of Newtonian gravity, what happens to space geometry?
A) It becomes curved
B) It turns into four-dimensional spacetime
C) It remains ordinary Euclidean geometry
D) It becomes non-existent
  • 9. Why is spacetime considered curved in the Newton-Cartan theory?
A) Space itself is non-Euclidean
B) Mass is distributed uniformly
C) The Newtonian connection is not integrable
D) The gravitational potential is zero
  • 10. In the geometric description of gravity, what is related to the derivative of the connection?
A) The speed of light
B) Electrostatic forces
C) Inertial mass
D) Tidal effects
  • 11. What is the Newton–Cartan theory?
A) A relativistic theory of electromagnetism
B) A theory of quantum mechanics
C) The study of friction in classical mechanics
D) A geometric formulation of Newtonian gravity
  • 12. In what year was Einstein's theory of general relativity published?
A) 1916
B) 1905
C) 1922
D) 1915
  • 13. Who summarized general relativity as: "Space-time tells matter how to move; matter tells space-time how to curve."
A) Henri Poincaré
B) Albert Einstein
C) John Archibald Wheeler
D) Isaac Newton
  • 14. The Einstein field equations are what type of mathematical equations?
A) Second-order partial differential equations
B) First-order algebraic equations
C) Third-order ordinary differential equations
D) Linear integral equations
  • 15. What is the primary obstacle to a unified theory of physics involving general relativity?
A) The curvature of spacetime
B) The existence of black holes
C) Lack of experimental data
D) Reconciliation with quantum physics
  • 16. Which collaboration directly observed gravitational waves?
A) The Prussian Academy
B) LIGO
C) The Hubble Institute
D) NASA
  • 17. Who found the first non-trivial exact solution to the Einstein field equations?
A) Marcel Grossmann
B) Georges Lemaître
C) Karl Schwarzschild
D) Alexander Friedmann
  • 18. What did Einstein later declare to be the "biggest blunder of his life"?
A) The Schwarzschild metric
B) The cosmological constant
C) The theory of general relativity
D) The rejection of quantum mechanics
  • 19. Which planet's perihelion advance provided early confirmation of general relativity?
A) Venus
B) Mars
C) Mercury
D) Jupiter
  • 20. Which mathematician pointed out the utility of Riemannian geometry to Einstein?
A) Marcel Grossmann
B) Karl Schwarzschild
C) Subrahmanyan Chandrasekhar
D) Henri Poincaré
  • 21. According to the text, what are black holes?
A) Regions of infinite density and zero time
B) The centers of expanding galaxies
C) Formations made of pure radiation
D) The end-state for massive stars
  • 22. In what year did Einstein begin his eight-year search for a relativistic theory of gravity?
A) 1905
B) 1913
C) 1919
D) 1907
  • 23. What is the Reissner–Nordström solution associated with?
A) Gravitational lensing
B) Electrically charged black holes
C) The expansion of the universe
D) Rotating stellar masses
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