For as long as one has no further point of reference, apart from the position of the maximum, the wavelength thus remains uncertain by an integral factor.
I've found a place that would amaze you. People used to live there, but now it's all overgrown and no one goes there. Absolutely no one - only me... Just a little house and a garden. And two dogs.
Foucault was the one person I met in France that I could talk to. He was a mensch. You know whether you agree with him or not because you know what he is saying.