E=mc²

Einstein's famous equation

E=mc² is Einstein's mass-energy equivalence formula, expressing that energy equals mass multiplied by the speed of light squared.

It reveals that mass and energy are interchangeable—a small amount of matter contains enormous energy.

The equation underlies nuclear physics and has become shorthand for scientific genius or breakthrough insight: It's not exactly E=mc².

physics

relativity

How observers differ

conversion · annihilation · nuclear · spacetime · momentum · reference frame · particle physics · relativistic · squared · constant

Einstein

genius

Person of rare brilliance

Princeton · Nobel Prize · physicist · thought experiment · chalkboard · wild hair · German · Swiss · pacifist · refugee

nuclear

atomic bomb

Fission-triggered mass destruction device

Hiroshima · nuclear reactor · chain reaction · uranium · plutonium · mushroom cloud · weapons · power plant · radioactive · enrichment

cosmological

Big Bang

Universe's explosive origin

  • sunEarth's primary star
  • starsLuminous celestial bodies
  • universeComplete system or domain

primordial · cosmic · supernova · black hole · gamma ray burst · quasar · dark matter · antimatter · cosmic rays · neutron star

cultural

pop culture

Mass entertainment and trends

scientific literacy · household name · documentary · biography · quotable · recognizable · universal knowledge · science communication · nerd culture · meme

Opposites
physics paradigm

E=mc²classical mechanics

Laws governing macroscopic motion

Newtonian mechanics · F=ma · Newtonian physics · classical physics · Newton's laws

conservation principle

E=mc²conservation of mass

Matter cannot vanish

scientific revolution

E=mc²F=ma

Force-mass-acceleration relationship

Newton's laws · clockwork universe · inverse square law · Boyle's law

Family

energy, mass, speed, light, equal, equals, equality, equalize, equation

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Rated G