The 15 quiz questions
Question 1 : Who formulated the theory of relativity?
Possible answers:
- Max Planck
- Niels Bohr
- Albert Einstein
- Isaac Newton
Explanation: Albert Einstein a publié la théorie de la relativité restreinte en 1905 et la relativité générale en 1915. Ces théories ont révolutionné notre compréhension de l'espace, du temps et de la gravité.
Question 2 : What is the speed of light in a vacuum?
Possible answers:
- 150 000 km/s
- 300 000 km/s
- 450 000 km/s
- 600 000 km/s
Explanation: La lumière voyage à environ 300 000 km/s (299 792 458 m/s exactement) dans le vide. C'est une constante fondamentale de l'univers, notée "c".
Question 3 : Which famous Einstein equation relates mass and energy?
Possible answers:
- PV=nRT
- E=hν
- F=ma
- E=mc²
Explanation: E=mc² is the special relativity equation published by Einstein in 1905. It means that energy (E) equals mass (m) multiplied by the speed of light squared (c²).
Question 4 : Which physicist discovered the laws of universal gravitation?
Possible answers:
- Galileo
- Isaac Newton
- Kepler
- Copernicus
Explanation: Isaac Newton formulated the law of universal gravitation in 1687 in his "Principia Mathematica," explaining why objects fall and planets orbit the Sun. Legend has it that an apple falling from a tree inspired this revolutionary discovery.
Question 5 : What is the name of the elementary particle responsible for mass?
Possible answers:
- The graviton
- The electron
- The photon
- The Higgs boson
Explanation: The Higgs boson, discovered in 2012 at CERN, is the particle that gives mass to other elementary particles. Peter Higgs received the Nobel Prize for this prediction.
Question 6 : Which quantum mechanics principle states that one cannot precisely know both the position and velocity of a particle?
Possible answers:
- Correspondence principle
- Superposition principle
- Pauli exclusion principle
- Heisenberg uncertainty principle
Explanation: Heisenberg's uncertainty principle (1927) establishes a fundamental limit to the precision with which certain pairs of particle properties can be known simultaneously.
Question 7 : Which force keeps electrons in orbit around the atomic nucleus?
Possible answers:
- Gravitational force
- Weak nuclear force
- Electromagnetic force
- Strong nuclear force
Explanation: The electromagnetic force, attraction between electrons (negative) and protons in the nucleus (positive), keeps electrons bound to the atom.
Question 8 : Which physicist discovered radioactivity with her husband Pierre?
Possible answers:
- Marie Curie
- Emmy Noether
- Irène Joliot-Curie
- Lise Meitner
Explanation: Marie Curie, with Pierre Curie and Henri Becquerel, discovered radioactivity. She received two Nobel Prizes: Physics (1903) and Chemistry (1911).
Question 9 : Which phenomenon explains why the sky is blue?
Possible answers:
- Rayleigh scattering
- Refraction
- Absorption
- Reflection
Explanation: Rayleigh scattering explains that blue light, with its short wavelength, is scattered more by the atmosphere than other colors, giving the sky its blue color.
Question 10 : What is the unit of force in the International System?
Possible answers:
- The Newton
- The Joule
- The Watt
- The Pascal
Explanation: The Newton (N) is the unit of force. One Newton is the force needed to accelerate a 1 kg mass at 1 m/s². It is named after Isaac Newton.
Question 11 : Which scientist formulated the fundamental equations of electromagnetism?
Possible answers:
- Heinrich Hertz
- Michael Faraday
- James Clerk Maxwell
- Nikola Tesla
Explanation: James Clerk Maxwell unified electricity and magnetism in his famous equations published in the 1860s.
Question 12 : What is the phenomenon called when light changes direction as it passes from one medium to another?
Possible answers:
- Reflection
- Dispersion
- Refraction
- Diffraction
Explanation: Refraction is the change in direction of light when it passes from one medium to another (e.g., air to water).
Question 13 : Which particle is responsible for the mass of other particles according to the Standard Model?
Possible answers:
- The gluon
- The Higgs boson
- The photon
- The graviton
Explanation: The Higgs boson, discovered in 2012 at CERN, gives mass to other particles through the Higgs field.
Question 14 : Which principle states that one cannot simultaneously know the exact position and velocity of a particle?
Possible answers:
- Exclusion principle
- Uncertainty principle
- Superposition principle
- Correspondence principle
Explanation: Heisenberg's uncertainty principle (1927) is fundamental in quantum mechanics and limits our knowledge of quantum systems.
Question 15 : What is the temperature of absolute zero in degrees Celsius?
Possible answers:
- -459.67°C
- -273.15°C
- -100°C
- 0°C
Explanation: Absolute zero (-273.15°C or 0 Kelvin) is the lowest theoretically possible temperature, where molecular motion ceases.
