Thread: So why aren't interference fringes visible from thick films?

I didn't think it mattered about the thickness of the films?
Im talking about wavelength/light/ the film on a bubble, etc.
What does the thickness have to do with anything?
eek :?

I think the difference is that with a thick film, the variability of the thickness, rippling of the surface, etc, could be on the order of a wavelength which would mess up the interference pattern.

Hmm... do you think the light would not even be able to pass through it, therefore it wouldn't be able to refract from the water (let's say) back onto the film?

Originally Posted by Jprojectrunway

Hmm... do you think the light would not even be able to pass through it, therefore it wouldn't be able to refract from the water (let's say) back onto the film?

No, I don't think that at all. If the light couldn't pass through, you wouldn't see the bottom of the container.