@ Kranthi Kumar, as I am not an economist, but searching on Google, I found a lot of information. And my analysis says that there will be very less impact on Indian stock market and Indian economy.
There will be very less impact because Britain exit from Euro zone does not mean from today onwards the pound will start go down and all business deal with India will get hampered.
This is a long run process to get exit, and it might bring higher business opportunity with UK in future for India.
Also it will reduces our expenses ( students who wish to study at UK, or tourist who visit UK). And UK investor will show more interest to invest in India now.
And Our stock market does not run only from UK Investor , so although we witness around 2.5% down fall in Index, that is not a big issue, that was just a sentiment fall.Because although there was crash in whole world our all 50 NIFTY stock did not go in red, it clearly indicates that we have our own strong economy and news to keep our market in control.