Understanding Einstein: The Special Theory of Relativity

12. Question 12 Alice creates a machine that can shoot basketballs in a horizontal direction. Using a radar gun, Bob measures the speed of the basketball coming from the machine…

4. Question 4 Which world line represents an object moving to the left at constant velocity along the x axis? 1 point    

1. Question 1 What is the simplest scientific meaning of the phrase “time is the fourth dimension”? 1 point   That an event that occurs can be specified using a…

11. Question 11 What is a non-inertial frame of reference? 1 point   It is a frame of reference that moves sideways compared to another frame of reference. It is…

10. Question 10 Of the world lines shown below, which represents an object moving with the highest velocity? 1 point    

8. Question 8 Consider Bob on Space Station Omega. At time t = 0, Alice flies by in her spaceship at constant velocity, heading to the right. She then quickly…

4. Question 4 Which world line represents an object that started at a nonzero location on the x axis and then moved to the right at constant velocity? 1 point…

3. Question 3 Consider person #1 moving to the right (positive x direction) at a constant velocity v with respect to person #2. Assume that at time t = 0…

2. Question 2 Consider Bob on Earth. At time t = 0, Alice flies by in her spaceship at constant velocity, heading to the left. Which diagram represents Alice’s world…

1. Question 1 What is the “photo clock principle”? 1 point   The idea that photographs cannot be trusted if they don’t have a timestamp on them. The idea that…