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Optical Fiber Waveguides – 1 – 3

11. The ratio of speed of light in air to the speed of light in another substance is called the :

(a) speed factor
(b) index of reflection
(c) index of refraction
(d) dielectric constant

ANSWER

EXPLANATION

12. The core of a fiber optic is surrounded by :

(a) wire braid shield
(b) kevlar
(c) cladding
(d) plastic insulation

ANSWER

EXPLANATION

13. Refraction is the :

(a) bending of light waves
(b) reflection of light waves
(c) distortion of light waves
(d) diffusion of light waves

ANSWER

EXPLANATION

14. When a beam of light enters one medium from another, which quantity will not change ?

(a) direction
(b) speed
(c) frequency
(d) wavelength

ANSWER

EXPLANATION

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