Here is a DIY solar filter being used on a light bulb at home. Hmm...seems to me it works properly as described, revealing the true shape of an object.
I have a lot of issues with that statement.
1. There is a HUGE difference between these things:
Light which is generated under optical conditions of an indoor room, spending 100% of it's time traveling through optical conditions of an indoor room, and hitting a light detector in the optical conditions of an indoor room
Light which is generated under the optical conditions A the vacuum of space, passes through optical conditions B the exosphere, passes through optical conditions C the thermoshpere, then D the mesosphere, then E the stratosphere, then F the mesosphere, then hitting a light detector in the chaotic surface level optical conditions.
notice this video.
Scenario 1:
let A = indoor air optical conditions
let B = glass optical conditions
let C = water optical conditions
path of light
A -> arrow -> A -> light detector = arrow facing left
A -> arrow -> A -> B -> A -> B -> A -> light detector = arrow facing left
A -> arrow -> A -> B -> C -> B -> A -> light detector = arrow facing RIGHT
Notice how passing through multiple different types of optical conditions DRAMATICALLY changes your perception?
2. You are using limited human perception here. Saying it looks like the true shape is like a doctor saying I don't need to wash my hands they look clean. Or like a physicist saying that the glass is not made of atoms because I don't see them.
Just because the limited abilities of the human eye and visual cortex are unable to perceive something does not mean that it does not exist.
We don't live in a glass of water. Cool trick though.
It's true we don't live in a glass of water. Yet the logic still applies.
The logic that still applies is this:
That video demonstrates that under conditions where the light that hits our eye has gone through multiple refractive mediums with different refractive indexes the electrical signal sent to the visual cortex, and the visual cortex's attempt to create a perception of said cloud of electrical signals can be grossly inaccurate to reality.
Light from the sun has gone through multiple different refractive mediums with different refractive indexes such as the vacuum of space, the exosphere, the thermoshpere, the mesosphere, the stratosphere, the mesosphere, chaotic surface optical conditions, and finally the complex different layers of your eye.
All you have done is added another variable to the equation by adding another set refractive medium transitions
New light path:
The vacuum of space, the exosphere, the thermoshpere, the mesosphere, the stratosphere, the mesosphere, chaotic surface optical conditions, a solar filter, more surface level chaotic atmospheric conditions after exiting the solar filter and finally the complex different layers of your eye.