Coherent and incoherent addition of waves|Interference of light waves#!#NEET Important and Previous Years Questions

n identical waves each of intensity I_(0) interfere each other. The ratio of maximum inensities if interference is (i) coherent and (ii) incoherent is

Find the maxinum intensity in case of interference of n identical waves each of intensity I_(0) if the interference is (a) coherent and (b) incoherent.