An Optical Fiber with Index of Refraction of 1 $\circ$
B)67

An optical fiber with index of refraction of 1.340 is surrounded by air.What is the critical angle for light to transport through this fiber without loss?

A) 12.56 ^$\circ$
B) 67.44 ^$\circ$
C) 35.62 ^$\circ$
D) 52.23 ^$\circ$
E) 48.27 ^$\circ$