Relativity
Special Relativity is often thought of as being so complicated that only few people can fully understand it. While some of the associated mathematics can be advance, the core principles are conceptually elegant and have played a pivotal role in modern physics.
Developed by Albert Einstein in 1905, Special Relativity marked a major shift in physics. Classical (Newtonian) physics treated space and time as separate, absolute entities. In contrast, Special Relativity introduced the idea of spacetime, a unified model where space and time are interconnected and relative to the observer. It further gave rise to one physics' most recognised equations, \(E = mc^2\). Special relativity has important applications including in medical imaging, astronomy, GPS devices and nuclear energy.
This resource revises Relativity and within Relativity there are three key concepts:
- Comparing Einstein Relativity to Classical Physics
- Time Dilation and Length Contraction
- Mass-Energy Theorem
To determine if this resource will benefit you, start by answering the following questions.
- Why does an emergency service’s siren sound different as you move towards or away from it?
- Is it possible to travel faster than the speed of light?
- How are space and time related?
The answers to these questions are provided on the following pages. Use this resource to refresh your memory, reinforce your understanding of these concepts, and prepare more effectively for university-level learning.