system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do pixels on certain digital devices like old calculators cast a shadow?

I've just noticed how the black pixels on monochromatic, non-backlit screens like digital radios and calculators cast a shadow on the screen itself, how is that happening?
gpt
i believe the device you're referring to is a LCD liquid crystal display. basically its a clear liquid that turns solid and opaque with the applicaation of a minor electric current. so that opaque segement is actually blocking light, casting a shadow on the reflector behind it.