From the wiki. I must admit that I did not know this term existed till a few weeks ago.
"Raga rock is rock or pop music with a pronounced Indian influence, either in its construction, its timbre, or its use of Indian musical instruments, such as the sitar and tabla. In addition, rock music from the 1960s and 1970s that incorporates South Asian musical influences and instruments, along with Western ideas of the Indian subcontinent, is often regarded as raga rock.
Since Indian influences in popular music are primarily limited to the 1960s, most raga rock recordings originate from that decade, although there are examples of Indian-derived sounds in post-1960s rock and pop music"
Listen to one of the earliest examples - the Yardbirds Heart Full of Soul here
Norwegian Wood (this bird has flown) by the Beatles here
Rolling Stones Paint it Black here
