Answered

why does the pencil appear broken at the boundary between air and wateras viewed from the side of a glass water

Sagot :

Jannajoydviz
for me it is due to the difference in density of air and water that also causes a difference in the path of light, since light travels along spaces between molecules naturally there is a difference on how the pencil appears
Asininityviz
due to the bending of light.