Professor Newman on… Back to the future
Sep 14, 2021
2 minutes
The first usable digital photography technology was developed by Louis Daguerre in 1839. The sensor was a silver-coated plate exposed to vapour of the halogen gases. Each droplet of the vapour would form a tiny crystal of silver halide on contact with the silver, to form the picture element or ‘pixel’. These pixels utilised the photoelectric effect, whereby the energy
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