On impact, thin layers of ice peel off. Light falling is reflected from the upper surface and from the surface of the crack. Two reflected waves and coherent. Depending on the path difference, the maximum conditions are satisfied for different wavelengths. We observe an interference pattern in a thin film, which is an alternation of multi-colored stripes.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.