Hey there

Yes you can MSc Physics. But you must have Physics as a compulsory subject in BSc. The points given below are the other courses which you can do after completing Bachelor of Science in maths:

1. Master of Science Mathematics
2. Master of Science actuarial science
3. Master of Science financial mathematics and computation
4. Master of Science in statistics
5. Master of Science in statistics and operational research
6. Master of data science

For more: https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/courses/physics-course&ved=2ahUKEwiY9KHJjcXzAhU7gtgFHerrDzAQFnoECAcQAQ&usg=AOvVaw2AX0tlhfn3_QHGY_LEVCeU