Deriving Einstein's most famous equation： Why does energy mass x speed of light squared？ (copy) (copy) (copy)

Equation equals MC squared

The most famous equation in physics, representing the relationship between energy (E), mass (M), and the speed of light (C).

Principle of relativity

The idea that the laws of physics are the same in all inertial frames of reference.

Frame of reference

A system of coordinates used to describe the motion of objects.

Time dilation

The difference in elapsed time between stationary and moving frames of reference.

Relativistic energy

The energy of an object taking into account its mass, velocity, and the speed of light.

Rest mass energy

The energy associated with an object's mass, even when it is at rest.

Mass-energy equivalence

The concept that mass can be converted into energy and vice versa, as described by Einstein's equation E=mc^2.

Speed of light

The maximum velocity that an object can possess, representing a fundamental limit in the universe.

Massless particles

Particles that have energy but no mass, such as photons.

Invariance of mass

The mass of an object remains the same regardless of the observer's frame of reference.