/sci/ - Science & Math » Thread #12210565

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math help anons?

math derp Fri 09 Oct 05:40:51 2020 No.12210565 View Reply Original Report

Quoted By: >>12210577 >>12212602 >>12212608 >>12212623 >>12212668 >>12212707 >>12214527

if something is one mile in diameter, removing any environmental or atmospheric distortions how far would it have to be before i can no longer see it anymore.. is there a formula i can reference?

Anonymous

Anonymous Fri 09 Oct 2020 05:46:27 No.12210577 Report

Quoted By: >>12210587

>>12210565
try drawing a diagram

math derp

math derp Fri 09 Oct 2020 05:49:55 No.12210587 Report

Quoted By:

>>12210577

thanks anon, im glad i came to the right place to find a mathemetician or at least someone who could articulate as to why my request doesnt work....but "draw a diagram" works i guess ...my freind told me to try plebbit instead of here but i told him i have more faith in my anons

Anonymous

Anonymous Fri 09 Oct 2020 11:33:12 No.12211235 Report

Quoted By:

Your eyes and cameras all have an effective angular resolution limit below which different features can't be resolved so you need to look that up, then you can calculate the distance the 1 mile object needs to be to give that angle which is just basic trig:
distance=1mile/tan(angle)

Anonymous

Anonymous Fri 09 Oct 2020 20:43:51 No.12212602 Report

Quoted By:

>>12210565
This means it is 1609 m tall, so you need to see how far it has to be to be behind the horizon.
A simplified formula is
D(km) = 4.2 sqrt( height (m)
and that works out to be nearly 170 Km.

Anonymous

Anonymous Fri 09 Oct 2020 20:46:19 No.12212608 Report

Quoted By:

>>12210565
It's either the maximal distance of visibility in air, or depending on your world, the circumference will cut it off.

Anonymous

Anonymous Fri 09 Oct 2020 20:50:46 No.12212623 Report

Quoted By:

>>12210565
>is there a formula i can reference?
No.

Because it will be more or less visible depending on environmental factors like being white and reflective on a dark background or dark on a white background etc.

Anonymous

Anonymous Fri 09 Oct 2020 21:07:55 No.12212668 Report

Quoted By:

>>12210565
is something a cylinder?

Anonymous

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Anonymous Fri 09 Oct 2020 21:26:46 No.12212707 Report

Quoted By:

>>12210565
Try checking air flight info. They separate instrument aided flight from visual flight. So they probably have some slacky metrics to "measure" visibility depending on altimeter and weather info

Anonymous

Anonymous Sat 10 Oct 2020 10:48:26 No.12214527 Report

Quoted By:

>>12210565
Depends if globeness of earth is enviromental distortion...

Problem is, you wouldn't even have to move, because object has no height.

Also depends on your eye sight.

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