An optical fiber with index of refraction 1.60 is clad in a material of index 1.30 . What is the ratio of the maximum time to the minimum time for light signals to travel down a given length of this fiber?
a. 1.60
c. 1.23
b. 1.30
d. 1.95
Question 2
An optical fiber is made with core material of index of refraction 1.6 . The fiber is clad with a material of index 1.2 . What is the speed of light traveling along the central axis of this fiber?
a. 2.5 108 m/s
c. 2.0 108 m/s
b. 1.9 108 m/s
d. 3.0 108 m/s