Dewdrops and the beautiful haloLANTUOYA WUAward: Top 100
School: beijing lu he international academy On the slender stems in the picture, dewdrops take on a perfectly round shape due to surface tension. Hydrogen bonding between water molecules causes the liquid surface to contract naturally into the smallest possible area, while capillary action enables the droplets to cling to plant surfaces. When sunlight passes through these transparent dewdrops, refraction and dispersion occur: water has varying refractive indices for light of different wavelengths, with violet light bending more significantly than red light, thereby splitting white light into a rainbow spectrum. Given the tiny volume of dewdrops, the range of light dispersion is limited, resulting only in localized colorful light spots. The circular bokeh highlights in the background are blur circles formed by out-of-focus light through the camera lens. Together with the dispersion effect of dewdrops, they compose this delicate microscopic optical scene. 
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