Hi

After B. Sc in physics you can pursue Maters in science in Physics ( M. Sc in Physics ).

You can do M. Sc in following fields

1. Physics in materials

2. Electronics

3. CFD

4. Astronomy

5. Applied physics

6. Nuclear science and application

7. Mathematical Physics

8. Medical radiation

9. Particle physics

10. Nanoscience

Many colleges in India offer M. Sc in physics. Some colleges conduct entrance exam whereas some take based on 12th score.

After M. Sc if you want to go in research field, you can do PhD in physics.