Recent content by vincent

Earth is moving through space. If I throw a ball straight up, it falls down to me and is not left behind. This is obviously because it already carries the momentum of Earth's movement. But if I fire a photon straight up, does it also carry a velocity component in direction of Earth's movement...

. Ok, This is where I have reached now. They are just going through time and not falling to anything. Under no gravity, they are going through time in straight line with no change in physical space location( as we perceive it). And under gravity, space gets curved with time, so their physical...

OK but for free fall what are these objects falling towards and why?

Thanks a lot. I think I have moved closer to grasping general relativity now.

OK. So, can I say that space time curve in a way changes relative distance between objects with passage of time although objects are following straight lines themselves. If there was no space time curve objects would have remained at same relative distance with passage of time.

To explain the concept of curved space time, we often use analogy of rubber sheet. If we put a heavy ball at the centre of sheet then it creates a depression and now a smaller ball will fall towards that heavy ball because of depression. But in this analogy smaller ball is falling down the slope...

I am a very curious person who wants to know new things and I become restless if I am not able to grasp a concept fully. I hope I will be helpful to the community.