In a potentiometer arrangement, a cell of emf \( 1.20 \, \text{V} \) gives a balance point at \( 36 \, \text{cm} \) length of wire. This cell is now replaced by another cell of emf \( 1.80 \, \text{V} \). The difference in balancing length of potentiometer wire in above conditions will be __________ \( \text{cm} \).
