The text book entitled Study of Dispersion in Honeycomb Photonic Crystal Fiber gives the introduction & nature of Photonic crystals. The work done shows that how dispersion is calculated for Honeycomb PCF using Hollow core fiber. The Hollow core PCF provide quasi-single mode operation by guiding light in Hollowcore surrounded by a micro-structured cladding formed by a periodic arrangement of air hole in Silica. The Scalar Effective Index Method is used for this calculation.