In this post, we define the terms time dilation, proper time interval, relativistic time interval, length contraction, proper length, relativistic length, rest mass, and relativistic momentum. This syllabus dot point is a part of the QCE Physics course under the topic of Special Relativity and sub-part Special Relativity.
What is time dilation, length contraction, and relativistic momentum?
Length contraction and time dilation explained
Relativistic mass