If you mean by "regular camera," the camera application on your phone, it just identifies the bytes encoded and spits out a string, number, or whatever the data might be. Most are numbers or URLs that can be useful depending on what application needs the data.
Discussion
This is the least helpful response possible.
Well, dude, you're the one who doesn't know what a QR code does. The QR you could be scanning might be an Njump event. It could be a number, or it could be a link from a URL. You weren't very specific, so I had to give a wide range of answers. But, thanks now I know not to help you with anything.👍
I know what a qr code does, but i don't know nhat the one from amethyst contains condmsidering i have one phone. You clearly didnt scan it from a non amethyst phone which is what the post was requesting
"It" the "one from Amethyst"
Which QR?
An Npub QR?
An Nevent QR?
A Lightning QR?
A Cashu QR?
Some random QR someone posted?
YOU were not very descriptive and effectively said "What happens when you scan some information on the internet with a Nostr client app on your phone?
Literally anything could happen because a QR is just visual data.
-With an Npub QR it COULD open a browser URL to an Njump profile or if you disable opening QR links your phone could say "no usable data"
-With an Nevent it COULD open a browser URL to an Njump event link or if you disable opening QR links your phone could say "no usable data"
-If it's a Lightning QR it could launch a Lightning app or if you disable opening QR links your phone could say "no usable data"
So, do you see how my answer was non-specific yet trying to help? Yet, instead of realizing that your question was not very good, you blame me.
For example:
This QR literally says: nostr:nprofile1qqsd68ua2qk8j5wlgl503mfyt69l5f8haqkz3uvnnx50pe6tqcgn5ggpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsz9nhwden5te0dehhxarjv4kxjar9wvhx7un89uq3wamnwvaz7tmjv4kxz7fwwpexjmtpdshxuet59u4288qe
What your phone does with this data depends on how your camera app tries to parse it.