An Observer Moving with a Light Clock in a Spaceship

question 68

Multiple Choice

An observer moving with a light clock in a spaceship sees a light flash bouncing up and down between parallel mirrors in 1 nanosecond. An observer at rest outside the spaceship sees the same up-and-down flash in

• A)1 nanosecond also.
• B)less than 1 nanosecond.
• C)more than 1 nanosecond.

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Definitions:

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