: if you travel with speed of the light your time will not stop or even slow down,you are just going to travel trough time without no back.your time will go normali for you but it will be longer for others because you travel in to the future.Why is the speed of the light diferent?it is because if you travel with the lightspeed for some time you will pass the longer way than you should in speed of 300 000 m/s but only theoretical because when you travel with this speed the ways are going smaller.for more contact me please. : sorry about my english,i dont speek it really good but i know the phisich.