lucy24 - 12:09 pm on Sep 18, 2013 (gmt 0)
o my question is can google index these pages in which visitor comes while browsing our website?
Google can and will index absolutely everything. Even when it doesn't particularly want to, as in the case of internal search-result pages. Indexing is like an addiction for them; they can't look at a page and say "Thanks but no thanks".
So you have to make sure that any page produced by your site search has an unambiguous "noindex" header.