Albert Einstein published his Special Theory of Relativity in 1905. This theory has had a major impact on all our lives, although how and why is not always obvious.

The purpose of these web pages is to try to relate the theory in a clear, concise and understandable way, with the mathematics and technicalities kept mostly to one side. While relativity has a reputation for being difficult much of it can be understood by anyone.

NEW! The Einstein was Wrong!!! pages...
      [Pages for crackpots. Opens in new window.]

Guides and Summaries:

• Special Relativity in under 15 minutes! A quick summary of Special Relativity.

Special Relativity Detailed Pages:

• Time Dilation. How time changes as a consequence of very high speed travel.
• Time Dilation at "Low" Speeds. How is time affected at low speeds, such as when flying?
• Time Dilation Worked Examples. Solving the time dilation equation.
• The Constancy of the Speed of Light. The fact that (almost) everyone refused to believe.
• Speed, Frequency and Wavelength in Light Waves. How they are mathematically linked.
• The Light Clock. A theoretical proof of time dilation.

E = mc2:

•  The Basics. What is E = mc² and what does it mean?
•  Solving the Equation. A simple walk-through of the equation.
•  Deriving the Equation. A bit tricky this one!
•  Energy from Radioactive Decay. What is radioactive decay?
•  Energy from Nuclear Fission. Pulling atoms apart.
•  Energy from Nuclear Fusion. Squeezing atoms together.
•  Quiz. Think you know your stuff? Take the E = mc² quiz!

Related Pages on this Site:

•   Galileo's Relativity. The Galilean transformation co-ordinate equations.

Was Einstein Wrong?

•   Einstein was Wrong!!! Spoof/anti-crank pages.

German Pages:

• Die Spezielle Relativitätstheorie in weniger als 15 Minuten!

Links to External Sites:

• Links. Links to other Web pages that may be of interest.