Which one of the following statements concerning the proper length of a meter st

Question

Which one of the following statements concerning theproper length of a meter stick is true?

a. The proper length is the lengthmeasured by an observer who is moving with respect to the meterstick.
b. The proper length depends upon thereference frame in which it is measured.
c. The proper length depends upon theacceleration of the observer.
d. The proper length depends upon thespeed of the observer.
e. The proper length is always one meter. Which one of the following statements concerning theproper length of a meter stick is true? The proper length is the lengthmeasured by an observer who is moving with respect to the meterstick. The proper length depends upon thereference frame in which it is measured. The proper length depends upon theacceleration of the observer. The proper length depends upon thespeed of the observer. The proper length is always one meter.

Explanation / Answer

the answer is e because it is measured buy an observer that is atrest relative to the object and is always 1 meter if the observer was in a relative frame moving relative to theobject, the distance of it tends to seem smaller than the actualvalue, a more detailed explanation can be found at http://books.google.com/books?id=1DZz341Pp50C&pg=PA270&lpg=PA270&dq=proper+length+of+a+meter+stick&source=bl&ots=Rjz4mDzKto&sig=ptSOVvnltZ3H7SSmAl21pVx6vNE&hl=en&ei=NrNeSt6YJIWNtgeqtpXgAw&sa=X&oi=book_result&ct=result&resnum=4

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