Suppose a third mirror is placed beneath the two shownin Fig. 32-47, so that all three are perpendicular to each other.(a) Show that for such a corner reflector, any incident raywill return in its original direction after three reflections.(b) What happens if it makes only two reflections?

*Centrifugal Force only present in noninertial reference frames* *Kinetic Friction implies “sliding” not rolling or walking, these involve static friction v 2 EQUATION μ s rg *only or pecific situations hen the static frict he centripetal acceleration* Circular Motion Problems Draw f ree body diagram What f orce is point oward the center F a v2 = ω r net c r Nonuniform Circular M otion Changing tangential velocity dω Angular acceleration α = dt Tangential cceleration at= rα v = rω