My Definition
A pinhole camera works by piercing a small hole into a light proof box this hole creates light inside the box the light is then selected from the scene opposite and inverted producing an inverted scene inside the box which will be captured on a light sensitive piece of paper this operation is called camera obscura.
Some History
The camera obscura has been known to scholars for decades a Chinese philosopher and the founder of Mohism, Mozi referred to this device as a "collecting plate" or "locked treasure room." Since then many people tried to expand this idea by producing pinhole cameras in a large scale examples are below:
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