a rocket ship of length L leaves earth at a vertical speed of 4c/5. a light signal is sent vertically after it which arrives at the rocket tail at t=0 according to both rocket and earth based clock. when does the signal reach the nose of the rocket clock according to (1) the rocket clockt (2) Earth clocks(adsbygoogle = window.adsbygoogle || []).push({});

(1)

t=L/c

(2)

[tex]t=\frac{L}{\sqrt{c^2-v^2}}[/tex]

[tex]t=\frac{L}{c\sqrt{1-(4/5)^2}}[/tex]

[tex]t=\frac{L}{\frac{3}{5} c}[/tex]

i know that this might be wrong but I'm not sure how to fix this mistake or which equation to use. any ideas?

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# Homework Help: Time dilation and a rocket

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