Fiber Optics in a DVD Player Contain Their Light by Employing

Multiple Choice

Fiber optics in a DVD player contain their light by employing total internal reflection. Designers surround the pure glass core with another type of glass, called cladding, that has a different index of refraction from the core. How should you select a cladding?

A) Cladding must have a smaller index of refraction than the core.
B) Cladding must have a larger index of refraction than the core.