A raft is 7.2 m wide and 6.0 m long. When a horse is loaded onto the raft, it sinks 2.3 cm deeper into the water. What is the weight of the horse

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.