Modern Physics
Mass-Energy Equivalence
The most famous equation in physics. Mass and energy are equivalent and interconvertible.
Variables
EJ
Rest energy
mkg
Rest mass
cm/s
Speed of light
Derivation
Derived from the relativistic energy-momentum relation for a particle at rest.
Your notes
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Common questions
What is the Mass-Energy Equivalence formula?
Mass-Energy Equivalence is written E = mc². The most famous equation in physics. Mass and energy are equivalent and interconvertible. It belongs to Modern Physics, under Special Relativity.
What are the units in E = mc²?
In SI units, E is rest energy, measured in J; m is rest mass, measured in kg; c is speed of light, measured in m/s.
How is the Mass-Energy Equivalence formula derived?
Derived from the relativistic energy-momentum relation for a particle at rest. The result is E = mc².