27. For the ladder paradox, the barn door closes at the exact same time that the ladder hits the back of the barn in the rest frame of the garage. Let's define Event 1 to be the door closing, and Event 2 to be the ladder hitting the back of the barn. In the reference frame of the ladder running toward the garage at relativistic speeds, what is the spacetime interval between those two events? A. A number larger than 0. B. A number less than 0. C. A number exactly equal to 0. D. You cannot determine from the given information.

27. For the ladder paradox, the barn door closes at the exact same time that the ladder hits the back of the barn in the rest frame of the garage. Let's define Event 1 to be the door closing, and Event 2 to be the ladder hitting the back of the barn. In the reference frame of the ladder running toward the garage at relativistic speeds, what is the spacetime interval between those two events? A. A number larger than 0. B. A number less than 0. C. A number exactly equal to 0. D. You cannot determine from the given information.