A plastic optical fiber is to carry all rays that propagate within of the fiber axis

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A plastic optical fiber is to carry all rays that propagate within

30^{\circ}

of the fiber axis. The core index of refraction is

1.50

. What is the greatest index of refraction that the cladding may have if this design requirement is to be met? (a)

1.44

(b)

1.25

(c)

1.33

(d)

1.30