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Article
PBS

Pbs Nova: Relativity and the Cosmos

For Students 9th - 10th
This well-written explanation of relativity includes animations and pictures which may be helpful in understanding a tough topic.
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eBook
Libre Text

Libre Texts: Physics: Distortion of Space and Time

For Students 11th - 12th
If the speed of light remains a constant then time and distance change. Oh, it can be confusing! This text will help clear up the confusion. Discussion questions should serve to reinforce comprehension.and exercises
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Graphic
Georgia State University

Georgia State University: Hyper Physics: Special & General Relativity

For Students 9th - 10th
This site from the Georgia State University provides an interesting chart form of the ideas of relativity. Column 1 - Idea, Column 2 - Experiment. Each item is linked to its own page of explanation, which is well done. A nice type of...
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Website
University of St. Andrews (UK)

University of St. Andrews: Special Relativity

For Students 9th - 10th
A historical approach to special relativity, giving all the events and names in the history of discovery of special relativity. Many links to these individuals.
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Website
University of St. Andrews (UK)

University of St. Andrews: General Relativity

For Students 9th - 10th
A somewhat labored but thorough explanation of general relativity, beginning with Aristotle. Many links to the personalities connected to the article.
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Online Course
Cosmo Learning

Cosmo Learning: Fundamentals of Physics

For Students 9th - 10th
A collection of video lectures from a fundamentals of physics course taught at Yale University. The course is an introduction to physics and discusses Newtonian mechanics, special relativity, gravity, thermodynamics, and waves. Course...
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Online Course
Learn AP Physics

Learn Ap Physics: Physics B: Modern Physics

For Students 9th - 10th
A site dedicated to help students prepare for the AP Physics B test. This specific site reviews Modern Physics including photons, photoelectric effect, atomic energy levels, The Michelson-Morley experiment, The Lorentz Transformation,...