Beautiful photos of sunsets .
If the sun is disappearing beneath the horizon shouldn't we observe this upward casting of shadow on all objects when conditions allow ? I've never seen this - only with mountains .
We know sunlight is refracted down through denser parts of the atmosphere . We also know that during sunset the angle of incidence reduces - there will be a point where the sunlight will reflect upwards ( critical angle if I recall correctly ).This could cause those shadows underneath those clouds . The densest moisture laden air occurs from sea level up to 30m . Anything below that 30m boundary , or whatever altitude that reflection occurs at , will not cast an upward shadow . Maybe that,s why we see this phenomenon only with mountains .
This attempt at an explanation fits FE , not saying it precludes GE theory but it shows that upward shadows of mountains does not preclude FE .