text: please i need your help!? when a beam of light passes at an oblique angle into a material of lower optical density, the angle of incidence is  a less than the angle of reflection. b less than the angle of refraction. c greater than the angle of reflection. d greater than the angle of refraction. first of all, that isn't biology, and second of all, i believe the answer would be d. but what do i know? im only in 10th grade.