No, time travel is not possible. We see any thing when light falls on our retina after striking a particular object. And after falling on any any object, light usually diverge.
It would have been possible to travel in time if we would have reached a place where light has not yet reached after getting reflected. In that case we would have seen the past after converging all the light that had traveled at any particular time. However it remains a complete theoretical concept. Because we'll change into energy once we try to travel faster than light to reach a place before light could reach it, so as to use any technology to converge the light & see the past. In the end i would like to add that even if we travel faster than light, we wont be able to change the past, we will just be able to view, what had happened. Just as we see a television broadcast.
In addition to it, it is impossible to travel in future. Because we cant see anything unless it has happened & light gets reflected after f
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