What colour are the feathers of the male peafowl’s tail? We are all familiar with the famous bright blue and green spots that are so characteristic of this bird, but perhaps not everyone knows that these intense, bright colours are not produced by pigments, usually browns, but by the microscopic physical structure of the feathers. Upon interacting with light, this causes a particular optical phenomenon that generates these striking shiny, iridescent hues. The colours thus produced change according to the angle of incidence of the light rays. Therefore, if you look at the object from different observation points, you will perceive a change in colour.
