A stick of proper length I moves past you at speed. There is a time interval between the front end passing you (first event) and the back end passing you (second event). We are interested in this time interval and in the length of the stick, as seen from various frames. (a) Draw snapshots of the two events as seen from your frame, marking with an arrow what is moving (you or the stick) (b) Find the length of the stick as seen from your frame, and the time between the two events, as seen from your frame. (c) Draw snapshots of the two events as seen from the frame of the stick,marking with an arrow what is moving, as seen from this frame (d) Find the length of the stick and the time between the two events, as seen from the frame of the stick. (e) In which frame is the time interval the proper time interval: your frame or the sticks frame? Explain why.

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