Use the inverse Lorentz transformation (15.21) to re-derive the time-dilation formula (15.8). [Hint: Consider again the thought experiment of Figure 15.3, with the flash and the beep that occur at the same positions as seen in frame Use the inverse Lorentz transformation (15.21) to re-derive the time-dilation formula (15.8). [Hint: Consider again the thought experiment of Figure 15.3, with the flash and the beep that occur at the same positions as seen in frame 3'.] Use the inverse Lorentz transformation (15.21) to re-derive the time-dilation formula (15.8). [Hint: Consider again the thought experiment of Figure 15.3, with the flash and the beep that occur at the same positions as seen in frame S'.]
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