# Big Bang Time Dilation

## Main Question or Discussion Point

I have been wondering this ever since I was in elementary school and I am hoping for an answer.
The time dilation equation for general relativity is time dilation=e^(gh/(c^2)). This applies to any object that has mass, and I am wondering if it also applies to the Big Bang (which has mass).
I am not looking for the value of time dilation. I am looking for a variable value of h, which is the vertical height from the mass to the object. Obviously, nothing exists out of the Big Bang, but there has to be time dilation. If there is nothing outside the Big Bang, then there cannot be a value of h.

Can someone give me an explaination?

Thanks in advance

## Answers and Replies

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Nabeshin
Science Advisor
I have been wondering this ever since I was in elementary school and I am hoping for an answer.
The time dilation equation for general relativity is time dilation=e^(gh/(c^2)). This applies to any object that has mass, and I am wondering if it also applies to the Big Bang (which has mass).
I am not looking for the value of time dilation. I am looking for a variable value of h, which is the vertical height from the mass to the object. Obviously, nothing exists out of the Big Bang, but there has to be time dilation. If there is nothing outside the Big Bang, then there cannot be a value of h.

Can someone give me an explaination?

Thanks in advance
This expression is only valid in the weak-field limit of GR in a constant gravitational field... So it works for something like gravity near the centre of the Earth, but means absolutely nothing in the early moments of the universe.