I wonder how much of a difference refraction of the suns light as it hits the atmosphere makes? It’s definitely the case that we see sunsets happening after the

I wonder how much of a difference refraction of the suns light as it hits the atmosphere makes? It’s definitely the case that we see sunsets happening after the sun has ‘geometrically’ set because of this. I guess one needs to make some argument about the rays from the reflected and non-reflected cases being close enough together that they get sufficiently similar angles of refraction.