A moving spaceship is measured by a stationary observer to have a length that is five‑sixths of its proper length. What is the speed ? of the spaceship relative to the observer? The speed of light is ?=3.00×108 m/s.
Solution: Given:- Speed of light, c= 3.00x108 m/s
Let be the length of spaceship as per observer and be the proper length of spaceship.
Then,
The contracted length as per observer is given by:
Here, v is speed of spaceship relative to observer, and c is speed of light.
m/s
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