Albert Einstein

Created by Kamila Klavíková

A concise, video-friendly overview of Albert Einstein's life, major discoveries, and lasting scientific influence.

#Albert Einstein, #physics, #relativity, #science history, #video

Scientific breakthroughs

Solvay conference 1927

E = mc²

The equation E = mc^2 became one of the most famous in science and a key concept in nuclear physics. It relates mass and energy. Since c^2 is huge, the amount of concentrate energy in mass is huge.

Energy and momentum

E = mc^2 is the simplest case.

The full equation also includes momentum, showing how energy, mass, and motion belong together:

E^2 = (pc)^2 + (mc^2)^2

Life

Born in Ulm in the German Empire, Einstein studied in Switzerland and worked at the Swiss Patent Office while developing some of his most important early ideas.

He later held academic positions in Europe and moved to the United States in 1933, where he joined the Institute for Advanced Study in Princeton.

Einstein photo

Special Relativity

The laws of physics are the same in all inertial reference frames, and the speed of light in a vacuum is the same for all observers regardless of their relative motion.

Because the speed of light stays constant for everyone, relative motion can stretch time, contract length, and connect energy with mass.

Relativity formulas

The Lorentz factor shows how strongly motion affects time, length, and energy:

$\gamma = \frac{1}{\sqrt{1 - \frac{v^2}{c^2}}}.$

For time dilation:

$\Delta t = \gamma \Delta \tau.$

Near the speed of light, grows. Moving clocks tick more slowly.

Atomic bomb and Oppenheimer

Einstein and Oppenheimer

Oppenheimer led the Manhattan Project; Einstein did not build the bomb. Einstein's role was indirect: in 1939 he signed a warning letter to Roosevelt after physicists feared Nazi Germany might develop nuclear weapons first.

Einstein's 1939 letter

Albert Einstein signature 1934.svg

General Relativity

Gravity is no longer modelled as force pulling objects together. Mass and energy bend spacetime, and objects move through that curved geometry.

Gravity as geometry

Einstein’s field equation says that matter and energy shape spacetime:

$G_{\mu\nu} + \Lambda g_{\mu\nu} = \frac{8\pi G}{c^4} T_{\mu\nu}$

That curved spacetime is what we experience as gravity.

Later Life

Einstein became a public intellectual as well as a scientist. He spoke about pacifism, civil rights, Jewish refugee aid, and the political dangers of nuclear weapons.

He spent his later years pursuing a unified field theory, even as quantum mechanics moved in directions he found philosophically troubling.

Photoelectric Effect

Einstein explained the photoelectric effect by proposing that light can behave as packets of energy, later called photons. Light energy competes with the material's work function:

$K_{\max} = h f - \phi$

1921 Nobel Prize in Physics

Einstein helped launch quantum theory and earned him the 1921 Nobel Prize in Physics.

Nobel Prize