Read this short discussion and note down about 4 sentences.

Relative speed Dilation of time. Special relativity is responsible for the apparent time dilation caused by relative velocity. When Janet and Jim, two observers, are traveling in different directions and come into contact with one another, they notice that the other person's watch is ticking more slowly than their own. Jim, who is moving in the other way from them, notices that both of their watches are ticking more slowly than they would ifJudy and Janet were moving at the same pace in the same direction. When someone is being observed, time seems to move more slowly than it does for the observer. Time dilation caused by gravity The general theory of relativity describes time dilation caused by varying distances from a gravitational mass. To an observer further away from a gravitational mass. your clock seems to be ticking more slowlythe closer you are to the mass. Observers perceive time slowing to a crawl'for them as a spacecraft approaches a black hole of enormous mass. Time dilation caused by gravity. The general theory of relativity describes time dilation caused by varying distances from a gravitational mass. To an observer further away from a gravitational mass, your clock seems to be ticking more slowny the closer you are to the mass. Observers perceive time slowing to a crawl for them as a spacecraft approaches a black hole of enormous mass