The scales of Arabhi are as follows :
Aarohanam (Ascending) : S R2 M1 P D2 S’
Avarohanam (Descending) : S’ N3 D2 P M1 G3 R2 S
Arabhi is a janya raga, derived from Shankarabharanam (below), 29th on the Melakarta scale.
This raga has a very energetic mood, displaying both veera and bhakti rasa. There are many well-known compositions in Arabhi such as Sadinchane, Chalakallaladukonna, Nada Sudha and O Rajeevaksha by Tyagaraja, Sri Saraswati Namostute by Muthuswami Dikshithar, Maragata Manimaya by Oothukadu Venkatasubbaiyar, Narasimha Mamava by Swathi Thirunal to name a few.
For knowledgeable readers, there is a discussion of Raga Arabhi here.
Note : The 12 notes in the octave are named as below. Please note that C is used as Sa for the sake of simplicity as the scale is relative in Carnatic Music. Also note that the scales paint only a superficial picture of the raga as the gamakas(ornamentations) are a very important part of a raga.