Ms. rwants to find out which bug spray works best: off, avon, or
cutter, four students her. these are her results:
group 1 (off): 4 mosquito bites
group 2 (avon): 18 mosquito bites
group 3 (cutter): 10 mosquito bites
group 4 (none): 28 mosquito bites
what should have been kept constant

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.