Hello aspirant!
Hope you are doing well!

You have already decided to pursue your career in field teaching after Bsc physical science. You can become a professor in renowned university/ colleges
But for that you need to have higher qualification, i.e., post graduate.

Top Colleges / Universities in India offering Physical Sciences:
University of Delhi
Mumbai University
University of Madras
Osmania University
Indian Institute of Space Science and Technology, Thiruvananthapuram

You can also try other fields.  Scope is there because there are many profiles you can choose to get in this field.

Some of the profiles are:

• Researcher
• Physician
• Chemist
• Professor
• Media/blogging
  
  Hope this helps!