Physics 112 Introduction to Refraction and Index of Refraction physics_112_refraction_dec_18.pdf physics_112_em_spectrum_dec_17.pdf Page 36 # 12 - 21 of the physics_112_problem_set.pdf Tomorrow: Snell's Law Physics 122 Circular Motion: Circular speed, centripetal acceleration and force, banked and unbanked turns. All problems on page 23, 25, and 26 in the physics_122_problem_set.pdf should be complete for Wednesday, Dec. 19. physics122_circular_motion_dec_17.pdf physics122_circular_motion_dec_13.pdf ***Follow me on Twitter!*** Get instant (or at least relatively quick) notification of recently uploaded videos and image galleries. Twitter  @mrpmacdonald I'll tweet upcoming importants dates and notes as well.