Dear aspirant,
To become a physics professor a research degree along with a PhD is a must. You should pass your 10+2 with either PCB or PCM with a minimum first class. Then you must complete a three year bachelor degree, in your case BSc Physics will be the degree to be completed with a minimum first class.
Then the student can apply for a masters which will help them prepare better for the PhD degree they are about to take and get the exposure needed, gives the students more in-depth knowledge of physics as compared to a bachelors degree.
Next, write GATE exam and try to achieve a high rank , if your focus is studying at IIT institutions. If you do not want to study at IIT, and want to consider other institutions then a UGC-NET score/ CSIR score is essential. You are also expected to have passed UGC-JRF to be eligible for monthly stipend during PhD.
Once you have completed your PhD you can move on to teaching at various institutions and universities as an Assistant Professor at the start and then slowly be promoted to the position of professor.
For studying Physics, you can consider top institutes from India like
IIS
IIT Kanpur
IIT Kharagpur
University of Delhi
University of Mumbai
University of Calcutta
VIT University
hope this helps!
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