Q # 9 of Chap # 8, QK Ghory
 

Assalam u Alaikum,
Can anyone please tell me how can this question be solved? Thanks

use concept of signals....
if first particle is thrown at time "t1"
and second particle is thrown after time "t" of first particle then its time would be "t1-t"

time delayed signal and time advanced signal..... u must have read it Signal and system course.... where you do convolution etc....

hope it helps otherwise let me know :}