sean99
pfm Member
I realized last night that my previous post was incorrect - the trig is explained here (2D)
https://earthscience.stackexchange....rvature-of-the-earth-to-be-visible-to-the-eye
The TL/DR is Snowdon is approximately 1000m high (1km) and the earth radius is 6350km, and the distance you could see from 1km high is roughly squrt(2*6350*1)km = 113km.
Since the distance in the photo is ~140km and you can clearly see a lot more than just the peak of Snowdon there must have been some interesting atmospheric refraction effect to make the photo possible.
https://earthscience.stackexchange....rvature-of-the-earth-to-be-visible-to-the-eye
The TL/DR is Snowdon is approximately 1000m high (1km) and the earth radius is 6350km, and the distance you could see from 1km high is roughly squrt(2*6350*1)km = 113km.
Since the distance in the photo is ~140km and you can clearly see a lot more than just the peak of Snowdon there must have been some interesting atmospheric refraction effect to make the photo possible.