Interference of light is explained in ncert class 12 physics chapter 10 notes. The interior and outside of an item refract light, causing this phenomenon. The reflecting surfaces might be parallel or interconnected. When it comes to light that reflects from the outside, this can be both beneficial and harmful according to wave optics class 12 notes

This is feasible because light travels when waves are generated on the inner and outer surfaces, resulting in colour. In addition, the vibrant colours of those wavelengths are included. As reflected light is cancelled in places where the waves are out of phase, destructive interference ensues.