3 Physics Experiments that Changed the World

The video explores three groundbreaking physics experiments. Henry Cavendish's 1797 experiment measured gravitational force, leading to the gravitational constant. Thomas Young's early 19th-century experiment demonstrated light's wave properties, challenging Newton's particle theory and contributing to wave-particle duality. Ernest Rutherford's 1909 experiment refuted the plum pudding model, revealing the atomic nucleus and shaping modern nuclear physics.

What is the primary focus of the introduction section in the video?

• The biography of famous physicists

• The future of physics research

• The history of physics

• The importance of experiments in physics

What did Henry Cavendish's experiment demonstrate for the first time?

• The theory of relativity

• Gravitational force between small masses

• The existence of black holes

• The speed of light

What significant constant did Cavendish's experiment help to determine?

• Planck's constant

• The gravitational constant

• The speed of sound

• The charge of an electron

What was the main conclusion of Thomas Young's experiment?

• Light behaves only as waves

• Light does not interact with matter

• Light behaves only as particles

• Light has both wave and particle properties

What was the prevailing theory about atoms before Rutherford's experiment?

• Atoms are clouds of positive charge with embedded electrons

• Atoms are made of electrons orbiting a nucleus

• Atoms are indivisible

• Atoms are composed of quarks and leptons

What did Rutherford's experiment reveal about the structure of the atom?

• Atoms are made of strings

• Atoms are mostly empty space

• Atoms have a dense nucleus

• Atoms are solid spheres

Which experiment led to the development of the modern atomic model?

• Cavendish's gravity experiment

• Young's light experiment

• Rutherford's atomic model experiment

• Einstein's photoelectric effect experiment