Air Wedge Experiment: Conditions for Bigger Scale?

[VVS2000]

TL;DR

Air wedge experiment

Are there any specific condintions for air to act as a screen? I just did my air wedge experiment yesterday and was wondering if we were to do it on a bigger scale, how would we do it?

 

[Ibix]

Considering that you have given no details of the experiment at all, I suspect it'll be rather difficult to answer. Do you mean an air wedge interferometer?