Q. 1. An event occurs at x′ =60m, t′ =8×10-8 sec in a frame S′ (with y′ =0, z′ = 0). The frame S′ has a velocity of 3c/5 in the x direction with respect to frame S. The origins of S and S′ coincide at t = 0, t′ = 0. What are the spacetime coordinates of the event in S?

2.The space and time coordinates of two events measured in the frame S are as follows:

Event 1: x1 =x0, t1 =x0/c, y1 =0, z1 =0

Event2: x2 =2x0, t2=x0/2c, y2 =0, z2 =0

(a) There exists a frame in which these events occur at the same time. Find the velocity of this frame with respect to S.

(b) What is the value of t at which both events occur in the new frame?

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