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There is this formula ∆t=Lv/c^2 I can't remember how it's called, but it is used to determine time difference between two clocks (one is at rest and the other is moving speed of v). L is the distance between two clocks. How do you derive this formula using special relativity?

Example could be: Spaceship is moving towards Earth speed of v, distance between spaceship and Earth is L, find the time difference between clock on Earth and spaceship.

Thank you for your answers

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# Deriving formula ∆t=Lv/c^2 using special relativity

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