2. On Earth, electrical systems are usually "grounded," giving excess electrons a place to go. Household wiring has a "ground," literally a big metal stake
pounded several yards into the ground. The stake is driven deep into Earth
because, in most locations, soil is damp once you get several feet
underground. Explain why damp soil helps the excess electrons move

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.