I want to make a pinhole solar eclipse viewer....You have seen them, I am sure, or the pictures from them. You punch some holes in a piece of stiff material, probably in some cute pattern, and the sun goes through and makes pinhole images.
So here is my question-----What is the ideal size of the pinhole?
What is the effect of different size pinholes?
Alex
Here is an example from 2006 in Egypt....(Sorry, don't know/remember who did the work on the pinholes, but I took the picture of it, it was so cute.)