When light enters a medium ofgreater optical density, it bendstowards the normal.
Normal lineincidentray i less dense denser medium ri = angle of incidencer = angle of refraction i>r refraction ray
Normal linecidenty i less dense air water denser medium r Light rays bendangle of incidence towards the normalangle of refraction air when the rays travel glass from a less dense medium to a denser refraction ray medium Light rays travel much slower in a denser medium
When light enters a medium oflesser optical density, it bends awayfrom the normal.
Normal lineincidentray i denser medium less dense r refraction ray i = angle of incidence r = angle of refraction i<r
dent ray idenser airmedium water less dense r Light raysray away from refraction bend angle of incidence the normal as it travels= angle of refraction air from a denser medium to a glass less dense medium. Light rays travel much faster in a less dense medium