Polymorphism

All the 3 clips below are based on the same raga - Revathi. The scale of Revathi raga goes like this: S R1 M1 P N2 S. Illayaraja has mostly used this raga for a gripping situation typically packed with action. Some examples include "Adada Ahangaara Adakka Peigal" (Pithamagan), "Sangeetha Jaathi Mullai" (Kaadhal Oviyam), Amma Azhage (Kaadhal Oviyam).

Same raga Revathi has been brilliantly used by Vijay Anthony in the movie "Naan Avan Illai" for a completely different situation.

And ofcourse, finally a devotional song based on "Revathi" raga by evergreen M.S.Subhalakshmi.

Bottomline: Raga is like a liquid that takes the shape of the container. Polymorphism in the world of music? Yes.