True or false: The proper length of an object is always greater than its length as measured by an observer who is moving with respect to the object.
Question
True or false: The proper length of an object is always greater than its length as measured by an observer who is moving with respect to the object.
Solution
False. According to the theory of relativity, the proper length of an object is its length as measured by an observer who is at rest with respect to the object. For an observer moving relative to the object, the length of the object would appear contracted. This is known as length contraction. Therefore, the proper length of an object is not always greater than its length as measured by an observer who is moving with respect to the object.
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