Einstein's Theory of Special Relativity

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Einstein's Theory of Special Relativity
Lesson
Transcript
Nicholas Amendolare, David Wood
Learn about the special theory of relativity. Understand what special relativity is and how it was developed. Know the theory of relativity equation. Updated: 12/13/2021
Table of Contents
What is the Special Theory of Relativity?
Special Relativity Equation
Einstein's Train Thought Experiment
Significance of Special Relativity
Consequences of the Special Theory of Relativity
Lesson Summary
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Frequently Asked Questions
Is special relativity accepted?
Yes, nearly all scientists accept the theory of special relativity. Even our satellites in outer space must use Einstein's equations to adjust their signals and synchronize their clocks with those on Earth.

What does the special theory of relativity say?
Einstein's theory of special relativity explains how speed, mass, time, and space are all interrelated. It outlines the formula e=mc^2, which states that energy is equivalent to mass times the speed of light squared.

What are the main principles of special relativity?
The main principle of special relativity is energy-mass equivalence. This is most famously illustrated with the formula e=mc^2, which states that energy and mass are proportional.

What is the Special Theory of Relativity?
In 1905, Albert Einstein published a paper containing his Special Theory of Relativity, also known as the Theory of Special Relativity of simply "special relativity" for short. The theory explains how speed, mass, time, and space are all interrelated. The theory also introduced the famous formula MCsq. which stated that energy is equal to the mass times the speed of light squared.

"Special relativity" is different from "general relativity," an expanded theory that Einstein would publish ten years later that would include the effects of gravity. But even by itself, special relativity included many important consequences that completely altered the world of physics.

A photograph of Albert Einstein late in his career.

Albert Einstein Einstein's Theory
Einstein was a genius and his work extremely complicated. It would be impossible to fully explain special relativity in a short lesson. But contrary to popular belief, it is possible to understand the basic ideas behind it without having a degree in physics. By the end of this lesson, you will be able to show off to your friends by saying that you actually understand the basics of Einstein's famous theory: a theory that changed physics forever.


What is the Theory of Special Relativity
Special relativity is a theory in physics that concerns the relationship between space and time and says that they're two sides of the same coin: spacetime. Like all scientific theories, it is backed by a large body of evidence and is widely accepted as being accurate.

The two main postulates of special relativity are:

The laws of physics are the same in all reference frames that are moving at a constant velocity (not accelerating
Two: The speed of light is the same in all of these reference frames

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