Either puncture the sealed end of
a tin can used a hammer and small
nail (be sure you have adult supervision)
2. Cut out a square piece of
wax paper slightly bigger that the
end of the tin can so that you can
wrap it completely around the end
of the can.
3. Place the wax paper over
the open end of the tin can and place
a rubber band around it to hold it
4. Cut out a small piece of
card to place on top of the small
hole that you made at the other end
of the tin can.
5. Using a large sewing needle
make a tiny hole in the piece of card
and place the pin in the hole and
sellotape to tin can. (remove
the sewing needle)
6. Turn on you filament light
bulb and hold you pinhole camera so
that the tiny hole side is closet
to the light bulb and look at the
wax paper to see if you can see the
image of the bulb on the wax paper.
A pinhole camera is a simple camera
without a lens and with a single small
aperture is basically a light-proof
box with a small hole on one end.
Light from a scene passes through
the small hole and projects an upside
down image on the opposite side of
the tin can or box. In bright lights
our eyes acts similarly, as do cameras
using small apertures.
The principle of a pinhole camera
is that light rays from an object
pass through a small hole to form
Up to a point, the smaller the hole,
the sharper the image, but the dimmer
the projected image.
Solargraphy is to capture the movement
of the sun over a long period of time
by using a pinhole camera.
Try doing this experiment outside
using the lighting from the sun but
do not look directly into the sunlight.