As for space-like events, space interval is pure, we don't find a frame in which events occur at same postion. consider this. for s two events occur at x1 and x2. for s' which is, say moving at relativistic speeds, due to length contraction may find the two events at same position. can't it happen?
Noo....because , in your case gamma factor has to ♾ (only then contracted length is zero ) , but for that "V" has to equal to "c" , but that's not possible
first velocity of light is same in all frames. And the case in which lightning did strike del x would be equal to c (del t), which is not case I as you have mentioned. The event occurred in S prime frame before the frame was coincident with the S frame and that may have made you believe that the del x changed sign. Moreover saying del x negative doesn't make any sense as you have not specified events and, also their order. Saying that it changes sign is more meaningful.
Sensational
As for space-like events, space interval is pure, we don't find a frame in which events occur at same postion.
consider this.
for s two events occur at x1 and x2.
for s' which is, say moving at relativistic speeds, due to length contraction may find the two events at same position.
can't it happen?
Noo....because , in your case gamma factor has to ♾ (only then contracted length is zero ) , but for that "V" has to equal to "c" , but that's not possible
How can delta x greater than L
sir for case 1 del X negative possible nnn we have already see the example of train and light strike in our previous lecture for case 1
first velocity of light is same in all frames. And the case in which lightning did strike del x would be equal to c (del t), which is not case I as you have mentioned. The event occurred in S prime frame before the frame was coincident with the S frame and that may have made you believe that the del x changed sign. Moreover saying del x negative doesn't make any sense as you have not specified events and, also their order. Saying that it changes sign is more meaningful.