Why do Newton Rings Form in Circular Patterns?

[FizixFreak]

why are Newton rings observed in a circuler pattern?

 

[Borek]

lol, I thought you are trying to advertise ringtones for mobiles.

I think it is a simple geometry - think about distances covered by different rays before they interfere.

 

[Doc Al]

why are Newton rings observed in a circuler pattern?

Consider how those patterns are typically produced--by putting a convex piece of glass over a flat plate. The curved surface has a spherical symmetry that leads to circular rings.

http://www.citycollegiate.com/Newtons_rings.htm"