Anuj, to just answer in one word, yes it is good. To elaborate it, you should not just stop after your Graduation. For starters, with B.Sc Physics you can apply for the role if Technician Assistant in ISRO. But as mentioned,for internal promotions, you may have to study further. DRDO, VSSC and SSPL are few Organisations that hire B.Sc Physics Graduates.

• If you want to stop at B.Sc Physics  few career options are Labaoratory Supervisor, Researcher, Consulting Physicist, Research Associate, Technician, Assistant, Teacher, etc
• If you want to pursue Masters, you have to appear for Entrance Examinations like IISER, TIFR GS, OUAT, JEST, NEST, IIT-JAM.
• Few specialisations in Masters after B.Sc Physics can be in Acoustal Physics, AstroPhysics, Astronomy, Bio Physics, Fibre Optical Physics, Fluid Physics, Geo Physics, Materials Physics, Medical Physics, Molecular Physics, Nuclear Physics, Optical Physics and Plasma Physics.