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physical optics
two waves interferences


dark newton ring fringes by a spherical surface and a plane surface separated by an air gap


Caution
Fill in all cells except one.
Choose all parameters unit.
The spherical surface is supposed convex.
Both surfaces where reflection occur are supposed to be dielectric interfaces. Consequently there is an air/glass and a glass/air reflection introducing an additionnal phase shift of p.
All parameters are positive.

InputValueunit
lam
R
h
k
OutputValueUnit
xkto be calculated
dark newton ring fringes by a spherical surface and a plane surface separated by an air gap
lam : wavelength R : radius of curvature of the spherical surface h : gap between the two surfaces k : dark fringe number ( counted from the center ) xk : radius of the dark ring fringe

Note
This calculation page can not detect all unrealistic inputs.



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