再さい帰き反はん射しゃ

noun

retroreflection

Technical term in physics and optics for the phenomenon where light or other radiation is reflected back to its source with minimal scattering.

• 再さい帰き反はん射しゃ素そ材ざいは夜や間かんの交こう通つう安あん全ぜんに役やく立だつ。

  Retroreflective materials help with nighttime traffic safety.