The center of Newton's rings appears dark due to the phase difference between two reflected rays, despite the path difference being zero when the surfaces are in contact. As the surfaces are separated, the path difference can change, but the phase difference remains significant, leading to destructive interference at the center. This phenomenon is critical in understanding the behavior of light in thin films and interference patterns.
PREREQUISITESStudents of physics, optical engineers, and anyone interested in the principles of light interference and wave optics.
The phase difference between the two reflected ways counts, and it is not zero, even in the case when the path difference --->0.sheld said:Why the center of Newton's ring is dark? though I am thinking the path difference in the center is zero between two reflected rays...
so,I will be glad if u give the correct information about that...