Mi E
a. You are walking around your town. First you walk north from your starting
position and walk for 2 hours at 1 km h. Then, you walk west for 1 hour at
1 kmh. Finally, you walk south for 1 hour at 2 kmh. What is your new
position relative to your starting place?
Plz help me with this question

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.