Jane moves at v = -0.3c relative to Fred. general in this case ----------------- ------------------- Galilean transforms: x' = x - v*t = x + 0.3*t t' = t = t Event Fred Jane ------------------------------------------------------------------------ t= x= t'= x'= 1. Line of men starting at x=0, 1 m apart, raise hand at t = 0 man at x=0 0 0 man at x=4 0 4 man at x=8 0 8 man at x=12 0 12 2. Man at x=0 has cold. 0 0 At t = 5, coughs. 5 0 At t = 10, sneezes 10 0 3. Doggie runs across field at speed 0.2c to left. At t=0, doggie at x=8. 0 8 Dog barks at t=5 5 7 Dog barks at t=10 10 6 4. Bird flies to right at 0.9c. At time t=0, bird at x=-3. 0 -3 Bird chips at t=0. Bird meets Dog 10 6 5. Man with cold flashes laser to right at t=8. 8 0 It strikes flower 3 seconds later. 11 3