Hey!

speaking of a physicist with a bsc, then a BIG NO. you cant really work in these fields (getting into there is tough. most people come with msc or phd) and what so ever quit and join other field.

but if you have a msc or phd, then you can join any of these fields (robotics is so tough as you need msc in engineering physics. mere physics wont work in robotics) and if you think you have enough knowledge in other fields,then quit and join them. which is not advisable as working in a same fields makes you expert in it and more over jobs in there areas are less, so if you get any one, and you earn good, then sticking on to it would be the best thing.

i hope it helps.

good luck