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What was the size of the universe at #10^-35# seconds ATB?

Answer 1

Difficult to quantify.

The universe's evolutionary epoch was brought about by a perturbation (quantum excitation) in the quantum foam at Planck time.

This happened at #(10^-43)# seconds. At this time symmetries were breaking. and forces and mass were being created.

At #(10^-35)# seconds the Inflationary phase was on,

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Answer 2

Claire Anctil

The size of the observable universe at (10^{-35}) seconds after the Big Bang was roughly (1.6 \times 10^{-26}) meters.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.