A quick at home science dive into refraction using a glass of water and a pencil. Learn why light bends, how to measure it, and connect the magic to everyday rainbows with simple steps anyone can follow. #Refraction #ScienceExperiment #Physics #LightBending #WaterExperiment #PencilInWater #RainbowScience #ScienceFun #STEM #EduYouTube #Shorts