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Re: [Phys-l] pinhole camera



On Apr 13, 2007, at 7:42 PM, Roger Haar wrote:

Hi,
A couple of more things to think about with the pinhole forming a
image discussion.

How small does a pinhole have to be to form an image?

Too big is not good (fuzziness) and too small is not good (not enough light, and diffraction). About 1 mm worked fine when the film was about 20 cm from the hole. But that was long time ago.
_______________________________________________________
Ludwik Kowalski, a retired physicist
5 Horizon Road, apt. 2702, Fort Lee, NJ, 07024, USA
Also an amateur journalist at http://csam.montclair.edu/~kowalskil/cf/