You can get plenty of jobs that aren't necessarily in a science related field with a BSc. If you want to be serious about research, honours then a PhD or a MPhil would be the best way to go. Other that research itself, you may be interested in mining, defence systems, finance, patent law, computer modelling, engineering. Physics grads end up in some pretty broad places, you'd be surprised.
It's great that you've decided on a major already, but don't close your mind to other fields. Geology, Biology, Chemistry and Comp are some really strong fields out there which you definitely look into whilst at a university level. Many people move from Physics to biology, like..an insane amount of people.