Question
Describe the construction and working of a pinhole camera.
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Answer
A pinhole camera is a simple device used to form images without a lens. It consists of a light-proof box or chamber with a tiny hole on one side called the pinhole. The opposite side of the box has a screen or photographic film where the image is formed.
Working: When light rays from an object pass through the tiny pinhole, they travel in straight lines and fall on the screen to form an inverted and real image of the object. The image is sharp if the pinhole is very small, but if the hole is too large, the image becomes blurred. This demonstrates the straight-line propagation of light.
Working: When light rays from an object pass through the tiny pinhole, they travel in straight lines and fall on the screen to form an inverted and real image of the object. The image is sharp if the pinhole is very small, but if the hole is too large, the image becomes blurred. This demonstrates the straight-line propagation of light.
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