A stretch of land is 12.5 km long on a map.
(a) What would be its length to an observer moving by, parallel to the stretch, at 0.95c?
(b) Which length is the proper length?
(c) How fast must the observer move for the land to appear 6.50 km long?

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The Answer of A stretch of land is 12.5 km long on a map.
(a) What would be its length to an observer moving by, parallel to the stretch, at 0.95c?
(b) Which length is the proper length?
(c) How fast must the observer move for the land to appear 6.50 km long?

A Stretch of Land Is 12