It’s 2018 and I still have no clue how CDs work. It’s a shiny disc, how do they get data on that, let alone that much?? Magic
Like a vinyl disc, where a physical groove is marked into the vinyl, a laser marks the ink of a CD in a similar manner.
A laser (your disc drive) can then look at the pattern in the ink and understand it.
There’s no grooves on a CD tho???
They’re just really tiny, hence the laser. The smaller grooves means that more info can fit on a disc of the same size.
Man how the fuck did they figure out how to make that