A small slit in a garage door created a natural pinhole effect, turning the entire space into a projection room where outside images appeared upside down on the wall. This phenomenon works on the principle that light travels in straight lines—rays pass through the narrow gap and project an inverted version of the scene outside. What seemed like an ordinary crack was actually acting as a primitive optical tool known as the camera obscura, one of the earliest forms of image projection! (Via: @swea

A perfect summer holiday activity: make a pinhole camera! This film was created as part of a workshop for the L'Oréal Young Scientist Centre. Visit the website to download the templates and more instructions: http://bit.ly/PinholeCamera_Ri | Royal Institution of Great Britain

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