How does a pinhole camera work?

A pinhole camera is typically made from a box with a small “pinhole” in one side of the box and a screen on the other side. The pinhole is so small that only a very small number of light rays can go through it. The diagram on page 211 shows how a pinhole creates a reproduction of the object on the screen. Note that it is not an image because light rays do not converge on the screen.

Pinhole cameras are easy to make and are often used during solar eclipses because it is very dangerous to look directly at the sun (during an eclipse or otherwise). With the sun at your back, point the hole up toward the sun and view the image of the moon passing in front of the sun on the screen.


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