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Illustration Light Clock: Light Paths in Right Triangle

Light Clock: Light Paths in Right Triangle
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In a moving light clock, the photon travels a different distance \(L'\) than in a stationary light clock: \(L\). Moving light clock moves to the right with velocity \(v\). The photon always has the speed of light \( c \) and covers the distance \(L'\) within the time \(\Delta t'\) and the distance \(L\) within the time \(\Delta t\).