No geographical coordinates

You could have shown it on a pyramidal earth, it would have been as valid.

I believe they are currently doing a really big one
https://eratosthenes.ea.gr

23 rd of September

Yeah hopefully the add defraction refraction for each spot

why would they add that for each spot

do you mean diffraction and refraction as separate additions

or diffraction refraction as its own term

Diffraction is: the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.

Refraction is: the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.

so you want them to add how the light spreads out through the wells and how it changes when passing through the wells?

Lol

well what do you want added

well refraction would mess up the well experiment

diffraction would too tbh as light enters the well

so yeah they should add defraction and refraction for each spot

but it isn't going through a medium/going through a narrow hole?

@mineyful it's going across an edge when it passes into the well

and it would directly affect the angle you're trying to measure

and on its way there, the atmosphere of course

going across an edge isn't a new medium and going through the atmosphere isn't going to get you divergent rays

also directly affecting the angle is the exact thing we're testing

that edge is supposed to make the angle we're testing

the atmosphere totally diverges rays

really?

and directly affecting the angle is bad bc it's by unpredictable refraction

we have a formula for that

yes, any time the rays start unparallel

snells law

do you?

no

nell's law is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.

snell's law is for refraction at a boundary

nsintheta

but any rays that start slightly non-parallel (the thing we're testing with the wells)

will have their divergence affected by refraction

i mean of course...they start at a point and have to reach different wells

that are miles apart

so rays from a point will diverge across miles

if that were true then putting wells inches apart should give different angles

and on the way to each well, refraction will affect them differently

where do you get inches? i never gave any numbers