6. The processing speed of a computer refers to the number of binary operations it can perform in a second. Thus, the processing speed is actually a frequency. If the processor of a personal computer operates at 1.80
GHz (1 GHz = 109Hz ), how much time is required for one processing cycle?

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.