How to Make
a Refrigerator Box into a Camera Obscura
of being able to be inside a large box where you can see large,
reversed images of the world outside gives some additional ways
of thinking about why pinhole images are reversed. These boxes
are easy to get and easy to turn into "camera obscuras". They work
best on sunny days.
box-An appliance stores is the cheapest source for a large box
like this, but you probably will have to alert them to save one
for you before they collapse them for recycling. You can also
buy large wardrobe boxes at moving companies.
- exacto knife
or utility knife
- 8-1/2" x 11" sheet
of white paper
Cut a hole in
one side of the box, approximately 4" x 6" at eye level.
To Do and
Ask two people
to tilt the box far enough so that someone can crawl in. Lower
the box slowly while the person stands up inside.
Give the person
in the box the sheet of paper, and then shut the top flaps so that
it is dark inside.
for a few minutes so that their eyes are adjusted to the darkness,
tell them to hold the paper up to the hole, and move it back and
forth until they locate the image.