aditya23456 said:
But for case of acquiring scholarship in most of M.sc programs requires a paper atleast in undergraduate level,then how are they expecting a paper from undergraduate level who can't spend years of time on research.
Aditya, I do not know of any MSc. programs that demand a paper for awarding scholarships. I understand what it is like for you, but at this stage, I don't think you need worry about such things; stop worrying about how to be 'great'.
At this point in time, do your best to learn the basics of physics well. I recommend reading 'So you want to be a physicist?' by one of our members ZapperZ.
Besides doing your best to learn the fundamentals properly, try to learn about other subjects as well. Diversify your interests at this point and try to dip your feet in everything, not just physics, not just academia. I suspect you are from India and know that exposure to such things is limited. However, given your access to the internet, you should be able to find material on absolutely anything. Simply do your best, and the rest will follow.
If the above advice is too simple for you and you still think you have to publish papers, show your friends who's boss, prove that you're the next Einstein, you could look into the Physical Review. Section D focuses on gravitation and cosmology.
Good luck.