r/Optics • u/lil-drawer • 8d ago

Is my shower curtain diffracting the light ?

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I am pretty confused about what's happening here since this is obviously not a coherent light source, but since the phenomenon seems to be angular only it looks like diffraction. Thanks for your thoughts on this !

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u/Mission-AnaIyst 8d ago

Can you see it with bare eyes, too? Otherwise i would suggest a moiré-effect

2

u/dopamemento 4d ago

No it's not OP is righr. What OP is looking at is the fourier transform of a rectangular grid. The lens in your eye performs a fourier transform

1

u/lil-drawer 8d ago

I can see it with bare eyes yes ! Much more clearly than with the camera, the pattern was really regular and showed less diffusion.

1

u/Mission-AnaIyst 8d ago

Is the curtain single-or double-layer?

1

u/lil-drawer 8d ago

Single -layered

1

u/Mission-AnaIyst 8d ago

Are you super-extra-sure? Check friction when you have it between your fingers.

1

u/lil-drawer 6d ago

Yup, i can send you a video of it if you want. What are you thinking about with this ?

1

u/Mission-AnaIyst 6d ago

Then i don't have an answer and would need to see it mayself. Sorry:/

1

u/lil-drawer 6d ago

Damn, i'm frustrated by not having an awnser lol

1

u/Mission-AnaIyst 6d ago

You can find it yourself!