M.Sc

Admission to the post graduate programme in medical microbiology will be based on the area of graduation in any of the subjects such as MBBS, BDS, B.Pharm, ayurveda medicine, homeopathy medicine, physiotherapy and B.Sc nursing etc. Apart from this, candidates who have completed graduation in any of the science subjects are also eligible to apply for this course. Candidates should obtain a minimum of 55 % aggregate marks in graduation from any university recognized by UGC. Candidates belonging to reserved category need to have 50 % marks only. Apart from these, candidates should have studied physics, chemistry, zoology or botany in the Bachelors degree, as well as higher secondary board examination.
Please refer to the link provided below for a list of entrance exams for M.Sc. courses and requirements to qualify in these exams. You can refer to the 2nd link for tips and strategies involved in preparation for these tests.
Link 1:https://www.shiksha.com/science/articles/top-bsc-msc-entrance-exams-in-india-blogId-13484
Link 2: https://www.shiksha.com/science/articles/how-to-prepare-for-top-msc-entrance-exams-blogId-13489

That depends entirely on what you want to do. You could pursue M.Sc. in Physics from Mumbai University. Please refer to the link provided below for details on Mumbai University. You should be able to decide whether you want to take admission in Mumbai University. I have also provided you the scope for M.Sc. Physics. You should be able to decide whether you want to pursue M.Sc. Physics.
Link1: https://www.shiksha.com/university/university-of-mumbai-fort-campus-856
Scope:
There are wide opportunities available for M.Sc Physics graduates in foreign countries. They can work in several health care, manufacturing and electronics companies in foreign countries. Students having high percentage during their post graduation can apply for jobs in National Aeronautics and Space Administration (NASA), one of most famous space research organization in the world.