Directions for Making a Pinhole Viewer
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1. Secure a cardboard box between about 12"x12"x10" and 24"x24"x20" (30x30x25 to 60x60x50 cm).
2. Leaving a top flap able to open, seal the cracks with tape to cover any light leaks.
3. Take something about the width of a pencil lead or pen tip, make a hole in middle of a box side as shown.
4. Enlarge the hole until the inverted image is bright, but not blurred.
5. If the hole is too big, tape over it with duck tape and try again.
6. View bright objects as depicted in the graphic above.
© 2004-2008, 4Physics
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