Albert Einstein - The Size and Existence of Atoms

The video explores Einstein's contributions to physics, starting with his explanation of the photoelectric effect and moving to his work on Brownian motion. Brownian motion, the random movement of particles in fluids, provides evidence for the existence of atoms. Einstein mathematically described this motion and used it to estimate the size of atoms, demonstrating a clever approach to understanding the unseen world of particles.

What was the focus of Einstein's work in March?

• The theory of relativity

• The quantum nature of light

• The movement of planets

• The structure of the atom

What phenomenon describes the random movement of particles in fluids?

• Brownian motion

• Quantum entanglement

• Photoelectric effect

• Gravitational waves

Who was not the first to mathematically describe Brownian motion?

• Albert Einstein

• Niels Bohr

• Isaac Newton

• Robert Brown

What did Einstein's work on Brownian motion provide evidence for?

• The existence of black holes

• The existence of atoms

• The speed of light

• The expansion of the universe

How did Einstein determine the size of atoms?

• By analyzing the gravitational pull

• By observing the color of light

• By measuring the movement of Brownian particles

• By calculating the speed of sound