I've read that it is possible to obtain Newton rings with white light, seing various rings of different colors, ordered by wavelength. However, in the case of the Fabry-Perot interferometer, it's not possible, and I don't quite understand why.

Can anyone clarify why you can obtain a pattern in Newton rings but not in Fabry-Perot?

  • $\begingroup$ If the light is white the intensity of the light should not follow ring-like pattern in both cases. This does not mean that the wavelength cannot change. I think you see newton rings with white light because you distinguish color, but in a Fabry-Perot maybe you are interested in detecting light intensity and therefore you do not get evidence of the rings. $\endgroup$ – AoZora Apr 9 at 14:38

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