# Solve: Time Dilation

Hi. I'm confused about the following problem:

Problem: The radar antenna on a navy ship rotates with an angular speed of 0.22 rad/s. What is the angular speed of the antenna as measured by an observer moving away from the antenna with a speed of 0.62c?

I don't know how to find delta t and delta t0. Is 0.22 rad/s the proper time?

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#### Solution Preview

0.22 rad/s is the proper time. However this is not delta t0, but just delta t.

Delta t0 is the time interval measured in the moving reference frame (in this case the moving ...

#### Solution Summary

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