# Ch 5: Relativity

Watch video lessons and learn about relativity. Study concepts like space contraction, mass, energy, gravity and more. These video lessons are short and engaging and make learning easy!

## Relativity - Chapter Summary and Learning Objectives

Most simply put, relativity is the dependence of things upon each other. When you hear about relativity, you may think of Albert Einstein. Einstein's theory of relativity is well-known and respected. However, this theory alone doesn't sum up relativity or how it works, and knowing it only provides you a minimum amount of information about relativity. As you will learn in this chapter, there are a lot of different elements and concepts related to relativity that you need to understand in order to grasp the full idea of what it is. Our instructor will take you through lessons that will help you understand the basic foundations of relativity and how it relates to everyday life. Some of the things that you will learn in these lessons include:

• Distance and time in relativity
• What classical relativity is
• The role of light in the breakdown of classical relativity
• The slowdown of time for a fast-moving object
• The shortening of distance for slow-moving objects
• What special relativity is

VideoObjective
Classical Relativity: Distance and Time Relation to the Observer Discover how distance and time are relative to the observer.
Light and Relativity: Breakdown of Classical Relativity with Light Example Examine how at fast speeds classic relativity breaks down.
Time Dilation: Description, Explanation & Examples Get an explanation of the concept of time dilation.
Space Contraction: Shortening Distance for Fast Moving Objects Explore the concept of space contraction .
Mass and Energy: Description and Interchangeable Relationship Study the relationship of mass and energy according to the theory of relativity.
General and Special Relativity: Theory and Examples Take a look at general and special relativity to learn how gravity comes to play in the idea of relativity.

Final Exam
Chapter Exam

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