Question

As the velocity of an inertial frame of reference increases with respect to a stationary observer, Einstein's theory of special relativity predicts that the length of an object, measured in the dimension parallel to the motion of the reference frame, will A. decrease B. remain unchanged C. increase D. increase at first but start to decrease when the speed of the reference frame equals half the speed of light. E. decrease at first but start to increase when the speed of the reference frame equals half the speed of light. 

          As the velocity of an inertial frame of reference increases with respect to a stationary observer, Einstein's theory of special relativity predicts that the length of an object, measured in the dimension parallel to the motion of the reference frame, will
A. decrease
B. remain unchanged
C. increase
D. increase at first but start to decrease when the speed of the reference frame equals half the speed of light.
E. decrease at first but start to increase when the speed of the reference frame equals half the speed of light.
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University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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As the velocity of an inertial frame of reference increases with respect to a stationary observer, Einstein's theory of special relativity predicts that the length of an object, measured in the dimension parallel to the motion of the reference frame, will A. decrease B. remain unchanged C. increase D. increase at first but start to decrease when the speed of the reference frame equals half the speed of light. E. decrease at first but start to increase when the speed of the reference frame equals half the speed of light.
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Transcript

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00:01 In this question we have to choose the correct statement about special relativity.
00:09 Absolute reference frame must be used measuring speed.
00:14 This statement is wrong because we use many times relative frames where we use the relative speed of the two objects or the relative speed of the two reference frame.
00:29 This question or this statement is incorrect.
00:33 Special relativity causes that all physical laws are relative to the observer, thus unreliable.
00:41 This is also incorrect.
00:45 Light is always observed to be traveling at the same speed to all observers across all reference frames.
00:52 This is the correct option, correct statement that the speed of light that is c is constant for all reference frames...
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