> I was recently in Tokyo on a business trip and didn't
> have many early appointments. Tending to want to sleep
> in, I would leave the heavy hotel room curtains closed
> at night so the early morning sun wouldn't wake me.
> One morning I was delighted to wake up to see an
> upside-down image of the scene outside projected on
> the walls of the room--created by a slit where the
> curtains didn't quite close. Just goes to show that
> even an extremely crude slit or hole will form an
> image! Reminds me of my very first experiments with
> pinholes in high school in the 70s--all I ever did was
> punch holes in tin foil with a pin and then tape the
> foil to a camera body. Worked fine.
>
> Colin
The same thing happens in my bedroom at home. The curtains form
a slit, and a large pine tree in the yard next door is projected
upside down on the wall.
Received on Thu Jan 3 09:06:48 2002
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