the glory of the blue的叙事作文

　　Male blue in the amazon jungle with striking rainbow blue light. Blue light is so strong, its secret lies in its wings have unique optical properties. Some actually reflect 70% blue light, far more than blue coatings reflectivity. This aroused the interest of scientists and engineers a lot, its principle is researched.

　　People in more than one hundred years ago found that blue wings have unique optical properties, but only recently begun to understand the mechanism of reflective blue wings and exquisite structure. Blue wings covered with many composed of a single epidermal cells on the tiny chitin scales, this is the powder when it hands touch the butterfly wings. Microscope observation scales, that scales surface with many parallel ridged bumps parallel arrangement of the plume. "Feathers" on both sides of the trunk gives birth to a number of branch, the length of the branches along the trunk from root to tip gradually become shorter. This structure is similar to man-made multilayer dielectric mirror, but the structure is more exquisite.

　　Synthetic multilayer dielectric mirrors made up of many layers of transparent medium, the reflected light has a strong directional: to close to the vertical incident monochromatic light has a very high reflectivity, but for the oblique incident light of the reflectivity is lower. In other words, the observer can only be seen in the small Angle reflection beams, slightly off can“t see. Surprise scientists are: blue wings glance is wide Angle, can see the Angle of up to a baidu! Blue wings of the secret of this wonderful optical performance is the branch of the plume is not completely in the same plane, but each has a slightly different Angle, this arrangement allows reflective Angle increase greatly. Blue wings also have color choices, which the size of the plume can enhance just blue light reflection, and its branches, the more reflective is stronger.