PART B: MATCH (5 MARKS) Match the denition from the 1St column below to the best term in die 2"'1 column below and place the matching letter in the appropriate space above. 1. The length of an object measured by an observer at rest relative to the object. A) ether 2. Consequence of special relativity in which two observers moving at constant velocity relative B) interferometer to each other will each observe the other's clock to have slowed down. C) length contraction 3. Highly rareed medium through which light and other electromagnetic waves were thought D) proper length to travel. E) proper time 4. The mass of an object measured by an observer at rest relative to the object. F) relativistic mass 5. Consequence of special relativity in which an object at rest in one frame of reference will G) relativistic speed appear to be heavier in another frame of reference. H) rest mass I) simultaneity J) time dilation