The Basics
The Basics What do the E = mc 2  units mean? Solving the Equation A simple walk-through of the equation  Deriving the Equation 1 Deriving E = mc 2  without calculus  Deriving the Equation 2 Deriving E = mc 2  using calculus (advanced) Energy from Radioactive Decay What is radioactive decay?  Energy from Nuclear Fission Pulling atoms apart  Energy from Nuclear Fusion Squeezing atoms together
E = mc2 Explained
The purpose of these pages is to explain E = mc 2  in a clear, concise and understandable way with easily followed worked examples, and with further pages examining the special theory of relativity in order to describe its background. Albert Einstein published his Special Theory of Relativity in 1905 and in doing so demonstrated that mass and energy are actually the same thing, with one a tightly compressed manifestation of the other. This mass-energy equivalence has had a major impact on all our lives, although how and why isn't always obvious. Although relativity has a reputation for being difficult much of it can be understood by anyone.
Time Dilation
Special Relativity in 15 Minutes A quick summary of Special Relativity Time Dilation How time changes during very high speed travel  Time Dilation Calculator New! How long does it take to reach the stars? Time Dilation Worked Examples Solving the time dilation equation  Time Dilation at “Low” speeds How is time affected when flying? The Constant Speed of Light Light is very, very strange…  Speed, Frequency and Wavelength Explained, and a calculator New! The Light Clock A theoretical proof of time dilation
Einstein The Mole
     Galileo’s Relativity The Galilean transformation co-ordinate equations       E = mc 2  & Relativity in the News 5 new particles detected - March 2017       FAQ Isn’t it just a theory?       Páginas en Español Pages in Spanish       Seiten auf Deutsch Pages in German      SI Units Explained: The mole How many atoms are there in a diamond? The ampere How many electrons are needed to make a cup of tea? The metre How long does it take to walk around the Earth?  The candela How many candles are as bright as a light bulb? The kilogram How much would you weigh on the Moon?  The kelvin How hot is a bolt of lightning?  The second Is a second always a second? SI Derived Units Just what is a henry?
Galileo Try The Time Dilation Calculator and see how long it takes to reach the stars!  Click me! Small Atom Amazon
The Basics What do the E = mc 2  units mean? Solving the Equation  A simple walk-through of the equation  Deriving the Equation 1  Deriving E = mc 2  without calculus (easy)  Deriving the Equation 2  Deriving E = mc 2  using calculus (advanced) Energy from Radioactive Decay  What is radioactive decay?  Energy from Nuclear Fission  Pulling atoms apart  Energy from Nuclear Fusion  Squeezing atoms together
The purpose of these pages is to explain E = mc 2  in a clear, concise and understandable way with easily followed worked examples, and with further pages examining the special theory of relativity in order to describe its background.
Einstein
Special Relativity in 15 Minutes  A quick summary of Special Relativity Time Dilation How time changes during very high speed travel  Time Dilation Calculator How long does it take to reach the stars? Time Dilation Worked Examples Solving the time dilation equation  Time Dilation at “Low” speeds  How is time affected when flying? The Constant Speed of Light Light is very, very strange…  Speed, Frequency and Wavelength How they are mathematically linked  The Light Clock A theoretical proof of time dilation
      Galileo’s Relativity      The Galilean transformation co-ordinate equations      E = mc2 & Relativity in the News      5 new particles detected - March 2017 New!      FAQ      Isn’t it just a theory?      Páginas en Español      Pages in Spanish         Seiten auf Deutsch      Pages in German      SI Units Explained:        The mole How many atoms are there in a diamond? The ampere Number of electrons for a cup of tea? The metre How long does it take to walk around the Earth?  The candela How many candles are as bright as a light bulb? The kilogram How much would you weigh on the Moon?  The kelvin How hot is a bolt of lightning? The second Is a second always a second? SI Derived Units Just what is a henry?
Galilieo
Albert Einstein published his Special Theory of Relativity in 1905 and in doing so demonstrated that mass and energy are actually the same thing, with one a tightly compressed manifestation of the other. This mass-energy equivalence has had a major impact on all our lives, although how and why isn't always obvious. Although relativity has a reputation for being difficult much of it can be understood by anyone.
Atom Electric Current Length Light Bulb The kilogram Temperature The second Small Atom