5. What is radar and how do we use it?

The energy equivalent of the rest mass of an electron is

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.

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical