# Ch 15: Classical Relativity: Help and Review

### About This Chapter

## Who's it for?

Anyone who needs help learning or mastering classical relativity will benefit from the lessons in this chapter. There is no faster or easier way to learn about this physics topic. Among those who would benefit are:

- Students who have fallen behind in understanding distance calculations, time dilations, and the relationship between mass and energy
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning physics (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about classical relativity
- Students who struggle to understand their teachers
- Students who attend schools without extra physics learning resources

## How It Works:

- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the classical relativity chapter exam.

## Why it works:

**Study Efficiently:**Skip what you know, review what you don't.**Retain What You Learn:**Engaging animations and real-life examples make topics easy to grasp.**Be Ready on Test Day:**Use the classical relativity chapter exam to be prepared.**Get Extra Support:**Ask our subject-matter experts any classical relativity question. They're here to help!**Study With Flexibility:**Watch videos on any web-ready device.

## Students Will Review

This chapter helps students review the concepts in a classical relativity unit of a standard college physics course. Topics covered include:

- Time and distance as relative concepts depending on the observer
- Using light to demonstrate how classical relativity works
- Clarification of time dilation and real-world examples
- The phenomenon of space contraction with faster moving objects
- The interchangeable relationship of energy and mass
- Different examples and theories of both special and general relativity

### 1. Classical Relativity: Distance and Time Relation to the Observer

Classical relativity is used to explain how speed is relative to the state of motion of an object and the observer. Explore classical relativity, distance and time, speed and motion, and discover a complex example of classical relativity and the exception to the rule.

### 2. Light and Relativity: Breakdown of Classical Relativity with Light Example

The relativity of distance and time accounts for the constant speed of light. Explore the theory of relativity, classical relativity and an example, discover if motion and speed are relative, and learn about relativity at high speeds and how light speed can be constant.

### 3. Time Dilation: Description, Explanation & Examples

Time is a relative concept and speed causes time to go slower. Learn about time dilation, including its description and explanation. Explore examples to understand that while time dilation is relative, the speed of light is not.

### 4. Space Contraction: Shortening Distance for Fast Moving Objects

Space contraction refers to the process of distance becoming shorter for fast moving objects. Explore this process and learn about length contraction and the speed of light.

### 5. Mass and Energy: Description and Interchangeable Relationship

Einstein's theory of relativity proved that mass and energy are relative. Explore Einstein's theory, his descriptions and evidence for the relativity of mass and energy, and learn about this interchangeable relationship of mass to energy and energy to mass.

### 6. General and Special Relativity: Theory and Examples

The speed of light is affected by both general and special relativity. Learn about the theories and consider examples of general and special relativity. Explore gravity and space-time in the context of general and special relativity.

### Earning College Credit

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### Other Chapters

Other chapters within the Physics 101: Help and Review course

- Introductory Physics: Help and Review
- Vectors: Help and Review
- Kinematics: Help and Review
- Laws of Motion: Help and Review
- Work and Energy in Physics: Help and Review
- Linear Momentum: Help and Review
- Equilibrium and Elasticity: Help and Review
- Sound and Light: Help and Review
- Fluids in Physics: Help and Review
- Laws of Thermodynamics: Help and Review
- Electrostatics: Help and Review
- Circuits in Physics: Help and Review
- The Physics of Magnetism: Help and Review
- Wave Optics: Help and Review
- Modern Physics: Help and Review
- Using Physics Formulas