If I continue from UG to PG wat scope will there for me and for get an opportunity for high salary and a good company.

The career opportunities are wide if you complete your post graduation programme. You can find the jobs in private and public sectors. With a Masters degree in Physics you can get the jobs with research institutions as technicians or as instructors.
There are many industries that Design and enhance scientific instrumentation. you will require the efficient service of a qualified Physicist.

Good Luck!