- #1
Pushoam
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Homework Statement
A.P. French q.no. 4.3
Homework Equations
t = L\c, (1)
L0 = ϒ L
The Attempt at a Solution
The observer's frame is that frame w.r.t. which the meter stick is moving with speed 0.8c.
The observer sees the mid-point at (x,y) at a time to(measured from the clock situated at the observer's position)
while mid-point passes the point (x,y) at time t [measured from the clock kept at (x,y)] .
And it is assumed that all clocks are synchronized.
Now ,
to = (√(x2+y2) )/c + t, (3)
x = vt, v = 0.8 c
At to =0,
t = - (√(x2+y2) )/c, note that t is negative here.
c2t2 = v2t2 + y2
t2 = 1/(1-0.64)c,
t =- 1/(0.6c)
So, At to =0, x= -4/3 m, y =0m
now, length of the meter-stick is L = 1(√(1-0.64)) m = 0.6 m
So, the left end will be at - (0.3+4/3)m and the right end will be -(4/3-0.3) at y=0.
Is this correct?
B)
The observer sees the mid-point at to= 1/c s.
C)To the observer the end points appear at 0.3 m left and right to the origin.What do I learn from solving this question?
Measurement of position of ends of stick at time t
And measurement of the time at which an event happens
will be different for observers located at different positions in the same reference frame.
Is my learning correct?