Re: slit cameras?

From: <Brigitte.Harper_at_domain.name.suppressed>
Date: Wed 07 Nov 2001 - 08:46:03 PST

Thanks guys.
But what does it mean in pratical terms of constructing or pairing
differently shaped slits. Is there anything I can do or avoid to do in
order to eliminate or diffuse the problem?
Regards,
Brigitte.

                                                                                                                                
                    "Guillermo"
                    <penate@home.com> To: <pinhole-discussion@pinhole.com>
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                    pinhole-discussion-admin@p Subject: Re: [pinhole-discussion] slit cameras?
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                    07/11/2001 13:08
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----- Original Message -----
From: "Tom Miller" <twmiller@mr.net>

> > Also, do you have any explanation why in some slit configurations
> > there is a lot of banding (thin black lines) forming over the image?
>
> This quote is from Jim Moninger's article in the Pinhole Journal vol.
> 15 #1 : "These are apparently caused by the light rays / waves with
> form the two separate images becoming out of phase with one another."
> Tom

Not just out of phase but 180 degrees from each other. This -perhaps- are
regions where light (wave) diffracted by one slit is at its maximum peak
(+)
and light (wave) diffracted by the other slit not just overlaps the former
but happens to be at its lowest peak (-), the net effect is darkness, light
from one slit canceling out with light from the other slit, weird, eh?
This
BTW, is called Destructive Interference.

Guillermo

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Received on Wed Nov 7 08:45:20 2001

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