1. The fictional rocket ship Adventure is measured to be 50 m long by the ship's captain inside the rocket. When the rocket moves past a space dock at 0.5c, space-dock personnel measure the rocket ship to be 43.3 m long. What is its proper length?
(a) 50m.
(b) 43.3 m.
(c) 93.3 m.
(d) 13.3 m.
2. As rocket ship Adventure (MisConceptual Question 1) passes by the space dock, the ship's captain flashes a flashlight at 1.00-s intervals as measured by space-dock personnel. How often does the flashlight flash relative to the captain?
(a) Every 1.15 s.
(b) Every 1.00 s.
(c) Every 0.87 s.
(d) We need to know the distance between the ship and the space dock.
3. For the flashing of the flashlight in MisConceptual Question 2, what time interval is the proper time interval?
(a) 1.15 s.
(b) 1.00 s.
(c) 0.87 s.
(d) 0.13 s.