Suppose Swarglok (heaven) is in constant motion at a speed of 0.9999c with respect to the earth. According to the earth’s frame, how much time passes on the earth before one day passes on Swarglok?
velocity of Swarglok with respect to Earth = 0.9999c
According to the Earth’ frame the velocity will be
Let one day on Earth = 
One day on heaven= 
days in heaven
1