'Stranger Things' photo dark room mystifies viewer in the modern world - Business Insider

The third season of " Stranger Things" is a delightful re-creation of 1980s smalltown America that's long gone, right down to the Waldenbooks and Sam Goody in the local mall.

It was a time before smartphones and the internet, before memes and the retail apocalypse. It was a time when photographs still had to be developed by hand in a "darkroom," just like one of the show's main characters has to do repeatedly while working for a local newspaper.

The darkroom from "Stranger Things." Netflix

But let's say you grew up in a world where photography was all handled by a magical supercomputer in your pocket — you might not know what "the purpose of this 'red room' is.

That's exactly what happened with one user posting to the online forum StackExchange in a question that's since gone viral on social media:


The "red room," of course, is a darkroom used for developing photos.

But the idea of a "Stranger Things" viewer outright not knowing what such a room is and what it's used for has made some folks feel absurdly old.

Thankfully, folks in the StackExchange forum generously supplied a thorough answer to the use of a darkroom in photography, and why a red light would be used to illuminate such a room.

But just in case you're wondering yourself: Before digital photography, images were developed by hand in chemical baths kept in "darkrooms." Light from the outside could potentially ruin any photos being developed, so a red light (which doesn't interfere with photo development) is often used.

And for the millions of you who grew up with darkrooms and manually developed photos: Yep, this is where we're at. Just wait until they start asking about cassettes!