Light and Time
The Special Theory of Relativity
Part of the Series: The Physics of Light

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The Physics of Light
PBS
While the terms "quantum physics" and "Theory of Relativity" are used casually every day, not many people know what they really mean. Yet these theories have had a profound impact not only on science and technology, but also on our world view. This intriguing 6-part documentary series explores the concepts…
Light and Space - The Theory of General Relativity
Part of the Series: The Physics of Light
While the terms "quantum physics" and "Theory of Relativity" are used casually every day, not many people know what they really mean. Yet these theories have had a profound impact not only on science and technology, but also on our world view. This intriguing 6-part documentary series explores the concepts…
In Pursuit of Light
Part of the Series: The Physics of Light
While the terms "quantum physics" and "Theory of Relativity" are used casually every day, not many people know what they really mean. Yet these theories have had a profound impact not only on science and technology, but also on our world view. This intriguing 6-part documentary series explores the concepts…
Light and Atoms
Part of the Series: The Physics of Light
While the terms "quantum physics" and "Theory of Relativity" are used casually every day, not many people know what they really mean. Yet these theories have had a profound impact not only on science and technology, but also on our world view. This intriguing 6-part documentary series explores the concepts…
Light and Quantum Physics
Part of the Series: The Physics of Light
While the terms "quantum physics" and "Theory of Relativity" are used casually every day, not many people know what they really mean. Yet these theories have had a profound impact not only on science and technology, but also on our world view. This intriguing 6-part documentary series explores the concepts…
Light and Strings
Part of the Series: The Physics of Light
While the terms "quantum physics" and "Theory of Relativity" are used casually every day, not many people know what they really mean. Yet these theories have had a profound impact not only on science and technology, but also on our world view. This intriguing 6-part documentary series explores the concepts…
Quantum Mechanics
In 1926 Erwin Schrodinger developed an equation that underlies much of our modern quantum-mechanical description of physical reality. Solve a simple problem with the Schrodinger equation. Then learn how the merger of quantum mechanics and special relativity led to the discovery of antimatter.
Time in Quantum Mechanics
Quantum mechanics is the most precise theory ever invented, yet it leads to startling interpretations of the nature of reality. Probe a quantum state called the collapse of the wave function that may underlie the arrow of time. Are the indications that it shows irreversibility real or only illusory?
Time and Relativity
According to Einstein's special theory of relativity, there is no such thing as a moment in time spread throughout the universe. Instead, time is one of four dimensions in spacetime. Learn how this "relative" view of time is usefully diagramed with light cones, representing the past and future.
Special Relativity
Episode 4 of Redefining Reality
Until 1905, physical reality consisted of absolute space, absolute time, and the luminiferous aether. Learn how Einstein's special theory of relativity overthrew this deeply ingrained view and heralded an entirely new conception of reality. Examine how cultural figures such as Kurt Vonnegut drew on this legacy.
Time and Space
Einstein's special theory of relativity upends traditional notions of space and time. Solve the simple formulas that show the reality of time dilation and length contraction. Conclude by examining the twins paradox, discovering why one twin who travels to a star and then returns ages more slowly than the twin…
General Relativity
Special relativity is limited to reference frames in uniform motion. Following Einstein, make the leap to a more general theory that encompasses accelerated frames of reference and necessarily includes gravity. According to Einstein's general theory of relativity, gravity is not a force but the geometrical structure of spacetime.