Time Flies (when you're having fun)
In this device, a light pulse bounces between two mirrors. "Tick tock tick tock."
What is a Light Clock?
Two of these might be surprised that they are different ages after one journeys through space.
What are twins?
This quantity, named after a famous physicist, is denoted by "gamma" and is the factor by which time is dilated.
What is the Lorenz Factor?