saw a very intersting thread on raagas.want to add something new so started a new thread.
i guess for beginers like me knowledge of the constituent notes of each raaga is of immense value. i realised the importance of this when i saw that each raaga strictly follows a unique ascent and descent pattern, so when you try to play a song note for note observe which pattern the song is following...if you recognise the pattern then you are home and dry because for the rest of the song you dont have to search for the notes...they will be from the list of notes for raaga .eg i tried out a few and these were the results:
shankara bharanam: the National Anthem,Ajeeb Daastaan hai yeh,main koi aisa geet gaaon,
nata bhairavi:chura liya,neele neele ambar pe,roj shaam aati thi
actually i think most of the hindi film music is in shankara bharanam,natabhairavi and keeravaani
so knowing a raaga will make it easier for you to play a song.
this is just a beginers analysis...comments invited from the gurus to show the leading light