A pinhole camera demonstrates that light travels in straight lines, as sunlight passing through a small hole in a shoebox creates an inverted image on photographic paper, with image sharpness and exposure affected by the distance between the pinhole and the image plane.
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The Tiny Home Pinhole ObservatoryAdded:
In a sunlit kitchen, a simple shoebox becomes a tiny observatory as sunlight passes through a small pinhole onto photographic paper.
A curious observer in the kitchen watches a mirrored upside down image form, proving light travels in straight lines.
Using a hinge of tape and a careful pinhole, the DIY camera runs without batteries [music] or screens.
Tweaks like paper distance and pinhole size reveal how focal length alters [music] sharpness and exposure.
This at-home optics experiment turns everyday objects [music] into a hands-on lesson in science.
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