Quote:
Originally Posted by The Lone Ranger
Okay, so what's the minimum size of the hole, then? Why is it that a small hole means that light is "instantly at the photoreceptor," but if you enlarge the hole, for some strange reason, light ceases to be "instantly at the photoreceptor"?
If the hole is 1 mm in diameter, will this mean that light is "instantly at the photoreceptor"? What if I then enlarge the hole to 1.5 mm?
At what size does the hole become large enough that it lets in enough light that light is no longer "instantly at the photoreceptor" -- and why? After all, the only difference between a small hole and a bigger one is that the bigger one allows more light to pass through.
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Totally diverging from the topic, the smaller the hole the sharper the image. Unfortunately a 1 mm hole would result in a very blurry image. The hole would need to be a fraction of a mm to give a sharp image. It's not called a "pin hole" for no reason. At 1 mm I doubt if you could recognize the subject, unless it were very close, very large, and without any fine detail. A human face would be out of the question, thus proving Peacegirl's point about dogs.
BTW, in my opinion, there is no size that will produce an instant image, as the pin hole camera works by allowing photons to pass through the hole to the back of the camera. And this can be demonstrated empirically.