Hello aspirant,

After graduation in physics, you can apply for masters in Science in marine geo physics at different universities.

You can give different entrance examinations for admission in Msc geophysics -

1. IIT JAM - for IITs and NITs
2. LPU Jalandhar.
3. BHU Varanasi.
4. Andhra University- AUCET.

I hope it helps,

Best of luck.