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Dear Visitors,                                                                                                                                    April 21, 2017

Thank you for stopping at FlatEarthLunacy.com

As a scientist with college degree in Astronomy, minor in Physics and Mathematics, I was appalled to find folks telling outright falsities and presenting bad science to bolster suspicion of our known accepted reality - that the Earth is a beautiful blue globe.

This blog clearly shows scientific proofs that debunk everything that flat Earth proponents claim.  Here we also expose the comments those YouTube video channels delete, because they don't want you to see them.

The Earth is not flat.  That claim is a conspiracy theory perpetrated by ignorant people who have ulterior personal motives and agendas.

The Earth is a beautiful blue spheroid globe spinning on an axis 23.5° once each day, and orbiting the Sun every 365.25 days.

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kind regards,  Jonah The Scientist


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Flat Earth NOT - The Rayleigh Criterion: flat Earthers ignorantly distorting physics once again to promote their fairy tale universe

 
The Rayleigh Criterion - flat Earthers ignorantly distorting physics once again to promote their fairy tale universe  

Flat Earthers now claiming that objects disappear at the Rayleigh diffraction limit.  Therefore that accounts for the bottom of boats disappearing at distance over water (instead of due to earth curvature).

Fact check:  False  
Because at the diffraction limit of resolution two objects appear to merge into one.  Nothing disappears.  For physical objects the original image size stays the same.    

What are the science facts about it? 

The Rayleigh criterion is the generally accepted criterion for the minimum resolvable detail - the imaging process is said to be diffraction-limited when the first diffraction minimum of the image of one source point coincides with the maximum of another.


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Figure 38.13 Individual diffraction patterns of two point sources (solid curves) and the resultant patterns (dashed curves) for various angular separations of the sources. In each case, the dashed curve is the sum of the two solid curves. (a) The sources are far apart, and the patterns are well resolved. (b) The sources are closer together such that the angular separation just satisfies Rayleigh’s criterion, and the patterns are just resolved. (c) The sources are so close together that the patterns are not resolved. 


What is Rayleigh cretieria for resolution?
In that case, the angular resolution of an optical system can be estimated (from the diameter of the aperture and the wavelength of the light) by the Rayleigh criterion defined by Lord Rayleigh: two point sources are regarded as just resolved when the principal diffraction maximum of one image coincides with the first...

What does diffraction limited mean?
An optical system with the ability to produce images with angular resolution as good as the instrument's theoretical limit is said to be diffraction limited. The resolution of a given instrument is proportional to the wavelength of the light being observed, and inversely proportional to the size of its objective.

How does diffraction affect resolution?
An optical system with the ability to produce images with angular resolution as good as the instrument's theoretical limit is said to be diffraction limited. The resolution of a given instrument is proportional to the wavelength of the light being observed, and inversely proportional to the size of its objective.


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For the human eye which has a pupil size of about 5 mm (millimeters) angle = 0.007 degrees. 


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Bob the Science Guy further shows that talking about Rayleigh’s criterion with regard to the bottom of boats is a fallacy.
Do the calculations (something flat Earthers don't often do) and look at the numbers. 

For two 100-meter tall buildings next to each other, according to the Rayleigh criterion they appear to merge together as one - at a distance no less than 818.5 kilometers.  But due to earth curvature those two buildings would be over the horizon and not even visible.  So using the Rayleigh criterion for the boat explanation is an outright deception.  It stems from flat Earthers not understanding physics and their desire to prove no curvature at any cost.


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Related article here…
Does Rory Owe Anyone 5000 Pounds?, by Bob the Science Guy

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Published on – April 10, 2019

Discussion at - https://www.youtube.com/channel/UC7ipUKERU0tzYFxALJBli4A/discussion

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kind regards, JonahTheScientist