Question

A spaceship with a proper length of 104 m passes an observer at a speed of...

A spaceship with a proper length of 104 m passes an observer at a speed of

0.71781c.

What is the length of the ship as seen by the observer?

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Answer #1

Solution:

Using the relation of Length contraction at the speed of light,

The length of the space ship, as measured by observers on Earth.

L = Lp1 - (v/c)2

= 1041 - 0.717812

= 1041 - 0.5153

= 1040.48475

= 104*0.696

= 72.41 m.

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