Critical thinking requires that a. conclusions be held constant after their initial determination b. conclusions be adjusted as necessary to incorporate new knowledge c. information from a particular source only be verified the first time the source is used d. there be a single solution to a particular problem select the best answer from the choices provided

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.